Siena Cathedral

The Cattedrale di Santa Maria Assunta in Siena is one of Italy's supreme examples of Italian Gothic architecture, with construction spanning from 1215 to 1380. Its exterior striped facade of white and greenish-black marble, studded with polychrome mosaics and sculptures, sets the tone for the entire building. The facade was designed by Giovanni Pisano, who also created many of the statues on the lower level — the originals are now in the Museo dell'Opera del Duomo; what stands today are replicas. Inside, the alternating black-and-white marble stripe pattern continues through the columns and walls, creating a hypnotic geometric rhythm unique in Italian church architecture. The floor is the cathedral's most exceptional feature: 56 marble inlay panels covering the entire nave, created by Siena's finest artists over a period of two centuries (1369–1547), depicting biblical narratives, allegorical figures, and the Sibylline books. The panels are only fully uncovered between mid-August and late October — at other times, many are protected by boards. The Piccolomini Library, entered from the left nave, contains 10 large frescoes by Pinturicchio (1502–1508) depicting the life of Pope Pius II with intense colour and detail. The Baptistery of San Giovanni beneath the cathedral houses a hexagonal font with bronze panels by Donatello and Ghiberti. The Opa Si Pass provides access to the cathedral, museum, baptistery, crypt, and the Facciatone — the unfinished facade of the never-completed nave extension — from which panoramic Tuscan views reward the climb.