Decoration of façade (detail)
by ARNOLFO DI CAMBIO, Photo
The fa�ade is characterized by over two hundred and fifty coats of arms, representing the coats of arms of all the vicariates of the city, from the oldest of 1410 to the most recent of 1769. These decorations are made of stone, in ceramics, and others are carved into the pillars of the building, or are frescoed.