Brunelleschi completed it in 1436 with the elegant dome, the inside of which was entirely frescoed by Vasari and Zuccari. The final phase in the construction of the cathedral, that is the completion of the facade, dates from the mid 19th century.
To the right of the cathedral rises the Bell Tower, or Campanile, designed by Giotto in 1334. The square tower is covered with red, green and white marble inlays, decorated with panels and carvings, and made graceful by double- and triple-windows.

