Six centuries of work have gone into the history of the Florence Cathedral or Duomo. The original project was designed by Arnolfo di Cambio, at the end of the 13th century (he worked on the Cathedral up until his death in 1302) while the cupola (a symbol of Tuscany itself) was created by Filippo Brunelleschi, a renowned artist of the Renaissance period. A number of works enriched year by year the cathedral, from the building of two sacristies, to the 16th century marble floors, from the execution of the sculptures to the frescoes signed by Paolo Uccello, Andrea del Castagno, Giorgio Vasari and Federico Zuccari. Like that of the Baptistery, the diameter of the Dome was projected to be 45.5 meters. Many years later when Grand Duke Francesco I de' Medici decided to construct a new facade in 1586, the sculptures on the existing facade, some of Arnolfo himself, were dismantled and transferred to the Museum of the Opera now beside the Duomo.