Duomo, Orvieto: the north wall

NOTES: Construction on the cathedral began in 1290 under the direction of Fra Bevignate di Perugia using a design by Arnolfo di Cambio. Progress was slow until in 1309 the Sienese architect Lorenzo Maitani was commissioned to work on the church and solve several issues concerning the load-bearing capabilities of the building. He substantially changed the design and construction of the building, creating the current facade and much of the interior before his death in 1330 shortly before the completion of the duomo.