Oldest parish church in Delft, built around 1200. Until Reformation known as the Roman-Catholic church of Saint Hippolitus. (Re-)built in stages. Oldest parts date from 14th century. The 75-metre-high leaning tower was built between 1325-1350. Last additions at Oudekerkstraat date from 1510-1536. Stone-clad façades are done in Brabant Gothic, designed by Antonis Keldermans. Pulpit (1548) is decorated with unique carvings in Renaissance style. Tomb effigies of navigators Piet Hein (under reconstruction) and Maarten Tromp. Unique collection of 27 stained-glass windows by Joep Nicolas (20th century).
Due to church services, the Oude Kerk is not open to visitors of Open Monument Day Delft on Sundays.