The Siena Cathedral (Duomo di Siena) is an exemplar of late Medieval architecture in central Italy. Many artists of Siena contributed their works to its building and adornment. The cathedral is cruciform in plan with an unusual irregular hexagon at its crossing. The sanctuary is built over the Baptistery of San Giovanni, which forms a crypt. The interior has striking black and white marble stripes on walls, piers, squinch-arches of the dome, and the floor. The cathedral also features the sculpted pulpit by Nicola Pisano.
Keywords: S. Giovanni, zebra marble striping.