Джованни Пизано
Built in two stages and combining elements of French Gothic, Tuscan Romanesque architecture, and Classical architecture, the west façade is a beautiful example of Sienese workmanship. Work began on the lower part around 1284. Built using polychrome marble, the work was overseen by Giovanni Pisano whose work on the Duomo's façade and the pulpit was influenced by his father Nicola Pisano.