Published April 5, 2013 at 560 × 373 in Orvieto and Pienza While the facade of the Duomo of Orvieto is colorful, the rest of the exterior is striped with alternating rows of travertine and green-black basalt blocks. The black-and-white striped exterior walls of the Duomo of Orvieto ‹ Return to post Leave a ReplyCancel reply This site uses Akismet to reduce spam. Learn how your comment data is processed.