The Basilica of St. Severin is an early Romanesque basilica church located in the Südstadt of Cologne (Köln). The former collegiate church is dedicated to St. Severin of Cologne. It is one of the twelve Romanesque churches of Cologne.
St. Severin was established in the late 4th century as a memorial chapel and extended several times. The oldest parts of today's building date back to the 10th century. It was designated a Basilica Minor by Pope Pius XII in 1953.