シエナ大聖堂
The Gothic façade of the Orvieto Cathedral is one of the great masterpieces of the Late Middle Ages. The three-gable design is attributed to Maitani, who had clearly undergone some influence by the design scheme for the façade in Tuscan Gothic style of the Siena Cathedral by Giovanni Pisano (1287–1297) and the plan for façade of the Florence Cathedral by Arnolfo di Cambio (1294–1302).