Located in the Old Part, the Church of San Vicente is the city's oldest house of worship. Built during the first half of the 16th century in the Gothic style, it houses one of the best Romanic altarpieces, by Ambrosio de Bengoechea and Juan de Iriarte.
Its other outstanding features are the French Cavaille-Coll organ, from 1868, and its impressive stained glass windows. On its side façade it has a “La Piedad” (Pietŕ) sculpture by Jorge Oteiza.