Side entrance to unfinished addition to the Duomo in Siena Tuscany Italy

Duomo; cathedral; church; Santa; Saint; Mary; Maria; dell Assunta; Assumption; Siena; Tuscany; Italy; marble; gothic; inlay; catholic; religion; travel; attraction; pillars; columns; blue sky; medieval; plague; unfinished; nave; facade; addition; abondoned; arches; archway; sight; sightsee; sightseeing; visitors; tourists; view; striped; staircase