Siena Cathedral is a masterpiece of Italian Gothic architecture built between 1215 and 1264. Famous for its stunning marble facade, exceptional mosaic floor of 56 panels, and Piccolomini Library with Pinturicchio frescoes. The complex includes the cathedral, baptistery, crypt, and museum.
OPA SI Pass €17 includes Cathedral, Library, Baptistery, Crypt, Museum and Facciatone. Valid 3 days. Mosaic floor uncovered mid-August to mid-October only.
Mid-August to mid-October for the uncovered marble floor. Weekday mornings have fewer crowds. The OPA SI Pass allows multiple visits over 3 days.
faq.subtitle Siena Cathedral
Construction began in 1339 to massively expand the cathedral. But the 1348 plague killed a third of Siena's population, and structural problems revealed foundation flaws. The project was permanently abandoned in 1357. The remaining wall (Facciatone) is now a panoramic viewpoint.
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