Cattedrale Metropolitana di Santa Maria Assunta Construction started: 1196 Opened: 1215 Construction finished: 1370 Address: Piazza del Duomo, 8, 53100 Siena SI, Italia Website: https://operaduomo.siena.it/it/ Works of Art: • Duccio di Buoninsegna (c.1255-c.1319): Maestà (1308-11) See also: • Cathedrals | Churches |…