Authorization   Document Date Summary Context of query o0201075.032ve 1419 giugno 9 Authorization to sell old ropes. Authorization to sell old ropes. o0201075.012a 1418/9 marzo 17 Authorization to sell pawns following proclamation. Authorization to sell pawns following proclamation. o0201072.020b 1417/8 febbraio 17 Authorization to sell pawns provided that the sale be proclaimed publicly three times. Authorization to sell pawns provided that the sale be proclaimed publicly three times. o0201078.008bisc 1420/1 febbraio 12 Authorization to sell pawns with obligation of proclamation to protect the interests of the distrained persons. Authorization to sell pawns with obligation of proclamation to protect the interests of the distrained persons. o0201073b.004c 1418 aprile 23 Authorization to sell pawns. Authorization to sell pawns. o0201075.021va 1419 aprile 22 Authorization to sell pawns. Authorization to sell pawns. o0202001.148e 1431 agosto 28 Authorization to sell pawns. Authorization to sell pawns. o0202001.216d 1434 maggio 4 Authorization to sell pawns. Authorization to sell pawns. o0202001.161d 1432 maggio 28 Authorization to sell pebbles and old stones. Authorization to sell pebbles and old stones. o0202001.217e 1434 maggio 28 Authorization to sell red marble. Authorization to sell red marble. o0201076.021ve 1419 ottobre 24 Authorization to sell solid iron. Authorization to sell solid iron. o0201078.008va 1420/1 febbraio 7 Authorization to sell stones to a private person. Authorization to sell stones to a private person. o0201076.011vd 1419 agosto 31 Authorization to sell stones to the hospital of Santa Maria Nuova. Authorization to sell stones to the hospital of Santa Maria Nuova. o0201078.014vb 1420/1 marzo 17 Authorization to sell stones to the wardens of the Opera of Santa Croce. Authorization to sell stones to the wardens of the Opera of Santa Croce. o0204004.001b 1432 (maggio 28) Authorization to sell stones. Authorization to sell stones. o0202001.136vh 1430/1 febbraio 7 Authorization to sell the building debris brought from the Tolosini palace. Authorization to sell the building debris brought from the Tolosini palace. o0202001.142vf 1431 maggio 16 Authorization to sell the household goods of a debtor. Authorization to sell the household goods of a debtor. o0202001.146c 1431 luglio 13 Authorization to sell the materials coming from the demolition of the jetties in the chiasso Bertinelli. Authorization to sell the materials coming from the demolition of the jetties in the chiasso Bertinelli. o0201075.020a 1419 aprile 22 Authorization to sell timbers and boards from the demolition of a ceiling in Santa Maria Novella. Authorization to sell timbers and boards from the demolition of a ceiling in Santa Maria Novella. o0202001.240b 1435 agosto 23 Authorization to sell two altar slabs. Authorization to sell two altar slabs. o0204004.001d 1432 (maggio 28) Authorization to sell two little marble altars. Authorization to sell two little marble altars. o0204004.007ve 1432 agosto 23 Authorization to sell two pieces of marble according to the usual valuation. Authorization to sell two pieces of marble according to the usual valuation. o0202001.147b 1431 agosto 16 Authorization to sell two pieces of marble. Authorization to sell two pieces of marble. o0201077.044ve 1420 giugno 15 Authorization to sell wax offered for Saint Zenobius. Authorization to sell wax offered for Saint Zenobius. o0202001.156e 1431/2 marzo 16 Authorization to sell white marble to private persons. Authorization to sell white marble to private persons. o0201075.003vc 1418/9 gennaio 23 Authorization to sell white marble with set price. Authorization to sell white marble with set price. o0201072.029c 1417/8 marzo 21 Authorization to sell white marble. Authorization to sell white marble. o0201075.027vh 1419 maggio 12 Authorization to sell white marble. Authorization to sell white marble. o0201076.003ve 1419 luglio 5 Authorization to sell white marble. Authorization to sell white marble. o0201076.011vg 1419 agosto 31 Authorization to sell white marble. Authorization to sell white marble. o0201076.017vd 1419 ottobre 7 Authorization to sell white marble. Authorization to sell white marble. o0201076.035va 1419 dicembre 15 Authorization to sell white marble. Authorization to sell white marble. o0201076.036h 1419 dicembre 19 Authorization to sell white marble. Authorization to sell white marble. o0201077.031vb 1420 aprile 3 Authorization to sell white marble. Authorization to sell white marble. o0202001.206vh 1433 ottobre 26 Authorization to set price of carriage of animals taken to the Pisan countryside in order to lay waste to the castles. Authorization to set price of carriage of animals taken to the Pisan countryside in order to lay waste to the castles. o0204004.028e 1433 ottobre 26 Authorization to set price to pay a carter for mules hired in the countryside of (Pisa). Authorization to set price to pay a carter for mules hired in the countryside of (Pisa). o0204004.013u 1432 ottobre 31 Authorization to set salaries for the masters. Authorization to set salaries for the masters. o0202001.115va 1429 ottobre 15 Authorization to set salaries of the unskilled workers for the winter. Authorization to set salaries of the unskilled workers for the winter. o0201082.017va 1423 maggio 22 Authorization to set salary for a master mason. Authorization to set salary for a master mason. o0201075.025a 1419 aprile 29 Authorization to set summer salary for unskilled workers and boys. Authorization to set summer salary for unskilled workers and boys. o0204011.027h 1425 agosto 17 Authorization to set terms of payment for debtors. Authorization to set terms of payment for debtors. o0202001.226d 1434/5 gennaio 11 Authorization to set the recompense for transport of the jambs and door of the corridor of the cupola. Authorization to set the recompense for transport of the jambs and door of the corridor of the cupola. o0201082.017a 1423 maggio 7 Authorization to set the salaries for the unskilled workers. Authorization to set the salaries for the unskilled workers. o0204004.028d 1433 ottobre 26 Authorization to set the salaries of the masters who went to the Pisa countryside to lay it waste. Authorization to set the salaries of the masters who went to the Pisa countryside to lay it waste. o0204011.030vd 1425 dicembre 10 Authorization to set the salaries of the unskilled workers. Authorization to set the salaries of the unskilled workers. o0201072.016va 1417/8 febbraio 1 Authorization to set the salary for messengers. Authorization to set the salary for messengers. o0201070.017a 1417 aprile 26 Authorization to set the salary for unskilled workers and boys. Authorization to set the salary for unskilled workers and boys. o0201083.011b 1423 novembre 18 Authorization to set the salary for unskilled workers. Authorization to set the salary for unskilled workers. o0202001.141a 1431 aprile 26 Authorization to set the salary for unskilled workers. Authorization to set the salary for unskilled workers. o0202001.151a 1431 ottobre 30 Authorization to set the salary for unskilled workers. Authorization to set the salary for unskilled workers. o0202001.225b 1434 dicembre 15 Authorization to set the salary for unskilled workers. Authorization to set the salary for unskilled workers. o0202001.203vc 1433 luglio 21 Authorization to set the salary of a blacksmith. Authorization to set the salary of a blacksmith. o0204004.025ve 1433 luglio 21 Authorization to set the salary of a (blacksmith). Authorization to set the salary of a (blacksmith). o0201077.033vb 1420 aprile 12 Authorization to set the salary of the unskilled workers for the summer. Authorization to set the salary of the unskilled workers for the summer. o0204004.009vp 1432 settembre 17 Authorization to some masters of the cupola to work on other tasks, excluding stone carving, when the weather is inclement. Authorization to some masters of the cupola to work on other tasks, excluding stone carving, when the weather is inclement. o0201070.021f 1417 maggio 19 Authorization to spend as much as is needed for the model of the cupola. Authorization to spend as much as is needed for the model of the cupola. o0201072.031c 1418 aprile 5 Authorization to spend for adorning an altar. Authorization to spend for adorning an altar. o0202001.170b 1425 luglio 12 Authorization to spend funds for work on the houses of the canons and chaplains. Authorization to spend funds for work on the houses of the canons and chaplains. o0201077.031c 1420 aprile 1 Authorization to stonecutter to work outside the Opera. Authorization to stonecutter to work outside the Opera. o0201077.016ve 1419/20 febbraio 7 Authorization to suppliers to transport lumber of the Opera together with that of the Commune of Florence. Authorization to suppliers to transport lumber of the Opera together with that of the Commune of Florence. o0202001.131vd 1430 settembre 18 Authorization to supply broad bricks. Authorization to supply broad bricks. o0202001.131ve 1430 settembre 18 Authorization to supply broad bricks. Authorization to supply broad bricks. o0202001.149va 1431 settembre 25 Authorization to supply broad bricks. Authorization to supply broad bricks. o0202001.188vh 1432 ottobre 17 Authorization to supply broad bricks. Authorization to supply broad bricks. o0201077.020vb 1419/20 febbraio 21 Authorization to tenant to pay the same rent paid to the previous owner. Authorization to tenant to pay the same rent paid to the previous owner. o0204011.021vd 1425 marzo 27 Authorization to the administrator and the master builder to contract out cutting of fir poles for the parapet of the tribune and of big logs for the cupola cranes. Authorization to the administrator and the master builder to contract out cutting of fir poles for the parapet of the tribune and of big logs for the cupola cranes. o0202001.108va 1429 giugno 16 Authorization to the administrator and the master builder to contract out sand for mortar for the cupola. Authorization to the administrator and the master builder to contract out sand for mortar for the cupola. o0201078.008bisb 1420/1 febbraio 12 Authorization to the administrator and the master builder to hire 12 stonecutters to finish the marble cornice of the cupola. Authorization to the administrator and the master builder to hire 12 stonecutters to finish the marble cornice of the cupola. o0202001.037d 1426 luglio 24 Authorization to the administrator and the master builder to sell marble of the Opera. Authorization to the administrator and the master builder to sell marble of the Opera. o0201081.007vc 1422 agosto 4 Authorization to the administrator and the master builder to sell ropes and hardware. Authorization to the administrator and the master builder to sell ropes and hardware. o0204011.005d 1422 agosto 4 Authorization to the administrator and the master builder to sell ropes and hardware. Authorization to the administrator and the master builder to sell ropes and hardware. o0201086.005vb 1424/5 marzo 7 Authorization to the administrator and the notary of the Opera to sell the pawns. Authorization to the administrator and the notary of the Opera to sell the pawns. o0204011.026vb 1425 luglio 20 Authorization to the administrator and the notary to order the release of persons arrested for the Opera. Authorization to the administrator and the notary to order the release of persons arrested for the Opera. o0202001.082b 1428 aprile 30 Authorization to the administrator and to the master builder to have a study made on request of a canon. Authorization to the administrator and to the master builder to have a study made on request of a canon. o0201074.028a 1418 novembre 15 Authorization to the administrator and to the notary of the Opera to set the compensation of the debt collectors for every demand of payment. Authorization to the administrator and to the notary of the Opera to set the compensation of the debt collectors for every demand of payment. o0201078.031vb 1421 maggio 24 Authorization to the administrator and treasurer to contract out supplies of stones from the quarry of the Opera. Authorization to the administrator and treasurer to contract out supplies of stones from the quarry of the Opera. o0201073.022a 1418 giugno 17 Authorization to the administrator for a contract for black marble. Authorization to the administrator for a contract for black marble. o0204011.021e 1424/5 marzo 3 Authorization to the administrator of Lastra and Malmantile to contract out the stairs for the castle to a carpenter. Authorization to the administrator of Lastra and Malmantile to contract out the stairs for the castle to a carpenter. o0201086.005vc 1424/5 marzo 7 Authorization to the administrator of Lastra and Malmantile to contract out the stairs for the castle to a carpenter. Authorization to the administrator of Lastra and Malmantile to contract out the stairs for the castle to a carpenter. o0204011.022d 1425 aprile 3 Authorization to the administrator of make adjustments in a house called the Galea given to Fra Bernardino. Authorization to the administrator of make adjustments in a house called the Galea given to Fra Bernardino. o0202001.245m 1435 dicembre 14 Authorization to the administrator of Pisa to come to Florence for questions regarding the Opera. Authorization to the administrator of Pisa to come to Florence for questions regarding the Opera. o0201086.010ve 1425 aprile 14 Authorization to the administrator of the Trassinaia quarry to rent a house for 6 months. Authorization to the administrator of the Trassinaia quarry to rent a house for 6 months. o0204011.022vi 1425 aprile 14 Authorization to the administrator of the Trassinaia quarry to rent a house for 6 months. Authorization to the administrator of the Trassinaia quarry to rent a house for 6 months. o0202001.083va 1428 maggio 12 Authorization to the administrator of the Wool Guild to have four carters at his service for two days. Authorization to the administrator of the Wool Guild to have four carters at his service for two days. o0201076.008vd 1419 agosto 7 Authorization to the administrator of the works for the friars of Doccia for cutting and transport of firewood. Authorization to the administrator of the works for the friars of Doccia for cutting and transport of firewood. o0204004.011vn 1432 ottobre 11 Authorization to the administrator to allocate a sum to have mortar brought from the kilns. Authorization to the administrator to allocate a sum to have mortar brought from the kilns. o0201078.028vc 1421 aprile 29 Authorization to the administrator to assign a dwelling to a chaplain. Authorization to the administrator to assign a dwelling to a chaplain. o0201086.024c 1425 giugno 21 Authorization to the administrator to assign to the sacristan the house where messer Antonio Ferrantini lived. Authorization to the administrator to assign to the sacristan the house where messer Antonio Ferrantini lived. o0202001.049va 1426/7 gennaio 22 Authorization to the administrator to commission large broad bricks. Authorization to the administrator to commission large broad bricks. o0201080.026va 1422 aprile 29 Authorization to the administrator to contract out 400.000 broad bricks to be conveyed in four years at set price, with advance to be deducted. Authorization to the administrator to contract out 400.000 broad bricks to be conveyed in four years at set price, with advance to be deducted. o0201083.007va 1423 settembre 28 Authorization to the administrator to contract out a house. Authorization to the administrator to contract out a house. o0201074.012f 1418 agosto 31 Authorization to the administrator to contract out broad bricks and corresponding advance of payment. Authorization to the administrator to contract out broad bricks and corresponding advance of payment. o0201078.004vd 1420/1 gennaio 23 Authorization to the administrator to contract out every month at least one braccio of stones. Authorization to the administrator to contract out every month at least one braccio of stones. o0201078.027a 1421 aprile 26 Authorization to the administrator to contract out further supply of broad bricks for the main cupola, because a greater number is needed. Authorization to the administrator to contract out further supply of broad bricks for the main cupola, because a greater number is needed. o0202001.038vd 1426 agosto 8 Authorization to the administrator to contract out gabelle and treasurership of the pawns with salary set. Authorization to the administrator to contract out gabelle and treasurership of the pawns with salary set. o0201079.046vb 1421 novembre 27 Authorization to the administrator to contract out hoisting materials up to the cupola for a year with specification of the compensation per load and of the advance. Authorization to the administrator to contract out hoisting materials up to the cupola for a year with specification of the compensation per load and of the advance. o0202001.053vb 1426/7 marzo 6 Authorization to the administrator to contract out mortar for Malmantile and letter to the masters instructing them to continue to work. Authorization to the administrator to contract out mortar for Malmantile and letter to the masters instructing them to continue to work. o0204011.033e 1425/6 marzo 18 Authorization to the administrator to contract out mortar with advance on payment. Authorization to the administrator to contract out mortar with advance on payment. o0202001.072e 1427 novembre 10 Authorization to the administrator to contract out mortar with concession of advance. Authorization to the administrator to contract out mortar with concession of advance. o0201078.031b 1421 maggio 24 Authorization to the administrator to contract out supply of broad bricks. Authorization to the administrator to contract out supply of broad bricks. o0201078.007b 1420/1 gennaio 31 Authorization to the administrator to contract out supply of mortar for five years. Authorization to the administrator to contract out supply of mortar for five years. o0201078.007va 1420/1 gennaio 31 Authorization to the administrator to contract out supply of mortar for five years. Authorization to the administrator to contract out supply of mortar for five years. o0201086.025c 1425 giugno 26 Authorization to the administrator to contract out supply of mortar. Authorization to the administrator to contract out supply of mortar. o0202001.023vb 1425/6 marzo 12 Authorization to the administrator to contract out supply of quarry stone mortar. Authorization to the administrator to contract out supply of quarry stone mortar. o0201078.014a 1420/1 marzo 15 Authorization to the administrator to contract out supply of sandstone blocks and stones with advance to the suppliers. Authorization to the administrator to contract out supply of sandstone blocks and stones with advance to the suppliers. o0201080.026b 1422 aprile 24 Authorization to the administrator to contract out the transport of log rafts from the port of Dicomano to that of San Francesco. Authorization to the administrator to contract out the transport of log rafts from the port of Dicomano to that of San Francesco. o0204011.032ve 1425/6 marzo 12 Authorization to the administrator to contract out to kilnman a supply of mortar of Alberese stone, with advance on payment. Authorization to the administrator to contract out to kilnman a supply of mortar of Alberese stone, with advance on payment. o0201080.025ve 1422 aprile 23 Authorization to the administrator to contract out two hundred towloads of lumber to be cut in the areas allowed. Authorization to the administrator to contract out two hundred towloads of lumber to be cut in the areas allowed. o0202001.077a 1427/8 gennaio 22 Authorization to the administrator to contract out white marble for the external ribs of the great cupola and advance on payment. Authorization to the administrator to contract out white marble for the external ribs of the great cupola and advance on payment. o0202001.073vb 1427 dicembre 19 Authorization to the administrator to contract out 60.000 broad bricks of various measurements. Authorization to the administrator to contract out 60.000 broad bricks of various measurements. o0202001.117vf 1429 novembre 21 Authorization to the administrator to credit carpenter. Authorization to the administrator to credit carpenter. o0202001.088f 1428 luglio 20 Authorization to the administrator to credit kilnman for supply of mortar. Authorization to the administrator to credit kilnman for supply of mortar. o0202001.046vg 1426 dicembre 5 Authorization to the administrator to debit a new iron sledge hammer to the convent of the friars of Ognissanti. Authorization to the administrator to debit a new iron sledge hammer to the convent of the friars of Ognissanti. o0204011.028l 1425 ottobre 22 Authorization to the administrator to deduct 2 soldi per lira from the stonecutters. Authorization to the administrator to deduct 2 soldi per lira from the stonecutters. o0202001.078b 1427/8 febbraio 9 Authorization to the administrator to demand payment of (debtor) and his injunction. Authorization to the administrator to demand payment of (debtor) and his injunction. o0204004.012b 1432 ottobre 14 Authorization to the administrator to denounce to the Commune those treasurers who are debtors of the Opera. Authorization to the administrator to denounce to the Commune those treasurers who are debtors of the Opera. o0201074.008ve 1418 agosto 18 Authorization to the administrator to elect a debt collector. Authorization to the administrator to elect a debt collector. o0202001.044b 1426 ottobre 25 Authorization to the administrator to give back roof tiles, previously broken, to the Tedaldi. Authorization to the administrator to give back roof tiles, previously broken, to the Tedaldi. o0201077.044b 1420 giugno 12 Authorization to the administrator to have hewn revetment stones delivered. Authorization to the administrator to have hewn revetment stones delivered. o0202001.085vd 1428 giugno 4 Authorization to the administrator to have marble conveyed from Pisa to the port of Signa. Authorization to the administrator to have marble conveyed from Pisa to the port of Signa. o0201086.016ve 1425 maggio 16 Authorization to the administrator to have the bell tower decked with laurel for the feast of Saint Zenobius. Authorization to the administrator to have the bell tower decked with laurel for the feast of Saint Zenobius. o0204011.024vi 1425 maggio 16 Authorization to the administrator to have the bell tower decked with laurel for the feast of Saint Zenobius. Authorization to the administrator to have the bell tower decked with laurel for the feast of Saint Zenobius. o0204011.021d 1424/5 marzo 3 Authorization to the administrator to have the pawns appraised and sold. Authorization to the administrator to have the pawns appraised and sold. o0201078.016a 1421 marzo 27 Authorization to the administrator to have the vines in the Opera's garden pruned and tied up. Authorization to the administrator to have the vines in the Opera's garden pruned and tied up. o0201079.048va 1421 dicembre 5 Authorization to the administrator to increase a contract for broad bricks. Authorization to the administrator to increase a contract for broad bricks. o0202001.104vb 1429 aprile 12 Authorization to the administrator to increase the amount of each allocation of funds. Authorization to the administrator to increase the amount of each allocation of funds. o0204011.027vd 1425 agosto 22 Authorization to the administrator to lease house and shop. Authorization to the administrator to lease house and shop. o0202001.070va 1427 ottobre 22 Authorization to the administrator to lend a pair of large tackles and a cord to a kilnman, with term of restitution. Authorization to the administrator to lend a pair of large tackles and a cord to a kilnman, with term of restitution. o0201086.009ve 1425 aprile 3 Authorization to the administrator to lend a rope to private person. Authorization to the administrator to lend a rope to private person. o0202001.235b 1435 maggio 27 Authorization to the administrator to lend a rope to the abbot of Vallombrosa with promise to return it within fifteen days. Authorization to the administrator to lend a rope to the abbot of Vallombrosa with promise to return it within fifteen days. o0201074.005vd 1418 agosto 6 Authorization to the administrator to lend a rope with compensation should it deteriorate. Authorization to the administrator to lend a rope with compensation should it deteriorate. o0202001.050vb 1426/7 gennaio 31 Authorization to the administrator to lend a rope. Authorization to the administrator to lend a rope. o0202001.166ve 1432 luglio 30 Authorization to the administrator to lend a saw. Authorization to the administrator to lend a saw. o0202001.052b 1426/7 (febbraio) 19 Authorization to the administrator to lend boards and hardware to sculptor. Authorization to the administrator to lend boards and hardware to sculptor. o0202001.013vl 1425 novembre 18 Authorization to the administrator to lend boards and other things, of which he must make an inventory. Authorization to the administrator to lend boards and other things, of which he must make an inventory. o0201074.007b 1418 agosto 9 Authorization to the administrator to lend cloth hangings to a private person. Authorization to the administrator to lend cloth hangings to a private person. o0201086.017c 1425 maggio 18 Authorization to the administrator to lend cloth hangings to those from Prato. Authorization to the administrator to lend cloth hangings to those from Prato. o0201074.006b 1418 agosto 6 Authorization to the administrator to lend large tackles and ropes to the confraternity of San Lorenzo. Authorization to the administrator to lend large tackles and ropes to the confraternity of San Lorenzo. o0202001.253c 1436 aprile 30 Authorization to the administrator to lend logs to the confraternity of Santo Spirito for its feast. Authorization to the administrator to lend logs to the confraternity of Santo Spirito for its feast. o0202001.106e 1429 aprile 21 Authorization to the administrator to lend rope. Authorization to the administrator to lend rope. o0201086.023vd 1425 giugno 21 Authorization to the administrator to lend two books of the new gabelles of Vico and Lari to the ambassador of Pisa and letter to the Captain of said city instructing him to keep a copy of said books in his palace. Authorization to the administrator to lend two books of the new gabelles of Vico and Lari to the ambassador of Pisa and letter to the Captain of said city instructing him to keep a copy of said books in his palace. o0201074.005c 1418 agosto 4 Authorization to the administrator to lend two large tackles. Authorization to the administrator to lend two large tackles. o0202001.047va 1426 dicembre 16 Authorization to the administrator to make adjustments to the sacristy where the clerics sleep. Authorization to the administrator to make adjustments to the sacristy where the clerics sleep. o0202001.172vb 1427 ottobre 14 Authorization to the administrator to make adjustments to the sacristy. Authorization to the administrator to make adjustments to the sacristy. o0201078.032f 1421 maggio 24 Authorization to the administrator to make collections and payments in place of the deceased treasurer. Authorization to the administrator to make collections and payments in place of the deceased treasurer. o0201086.009b 1425 aprile 3 Authorization to the administrator to make expenditures for repairs in a house called the Galea rented to Fra Bernardino master of glass oculi. Authorization to the administrator to make expenditures for repairs in a house called the Galea rented to Fra Bernardino master of glass oculi. o0202001.088i 1428 luglio 20 Authorization to the administrator to pay bargemen, debiting the marble suppliers. Authorization to the administrator to pay bargemen, debiting the marble suppliers. o0201078.023vd 1421 aprile 16 Authorization to the administrator to promise to the creditors the extinction of a debt of a lumber supplier, with guaranty in the presence of the notary to supply lumber in the amount concerned. Authorization to the administrator to promise to the creditors the extinction of a debt of a lumber supplier, with guaranty in the presence of the notary to supply lumber in the amount concerned. o0202001.094h 1428 novembre 23 Authorization to the administrator to purchase a cartload of boards and "chiavatoi". Authorization to the administrator to purchase a cartload of boards and "chiavatoi". o0202001.107vd 1429 giugno 3 Authorization to the administrator to purchase hardware from the Wool Guild. Authorization to the administrator to purchase hardware from the Wool Guild.

© 2015 Opera di Santa Maria del Fiore