Arnolfo di Cambio designed Il Duomo di Firenze which is the original name of the Cattedrale di Santa Maria del Fiore. Its Gothic style construction started in 1296 and completed structurally by Filippo Brunelleschi who received an opportunity of a lifetime in 1418. He was asked to build the dome for Santa Maria dei Fiori and he had no formal architecture training. He considered the challenge carefully and proposed brilliant architecture methods that experts do not fully understand even today. This was the largest church in Europe after it was completed in 15 th century. It was built over the 7th-century church of Santa Reparata. As far as its interior is concerned, the clock above the entrance was designed in 1443 by Paolo Uccello, and the biggest artwork in the cathedral is Last Judgment fresco designed by Giorgio Vasari in 1572 and painted by his students Frederico Zuccari in 1579.