ruins of Roman city walls and two towers

The former water tower built in 1868-1872 is now used as a luxury boutique hotel. The 11th floor (at 35 metres) houses a terrace and glass covered dining/meeting room, which can be rented out for private functions.

An early Romanesque basilica in the southern part of the Old Town, once serving as the church for a Benedictine abbey. It is dedicated to St. Pantaleon, St. Cosmas, and St. Damian. Sightseeing is restricted to times outside of religious services; information regarding public tours and group registrations can be found on the official website.

The lesser-known next-door neighbour of St. Cäcilien

Founded in 1059, this basilica is noted for its Roman-era columns and vaulted architecture that earned it the nickname "Ravenna on the Rhine." It stands on the site of a former Roman guard post. Sightseeing is restricted to times outside of religious services; for information on public tours and group registrations, please visit the official website.

A Staufen-period pillar basilica and one of Cologne's twelve great Romanesque churches. It features notable historical elements such as a 12th-century tympanum and remnants of Ottonian architecture. Since 1956, the church building has housed the Museum Schnütgen, which showcases an extensive collection of medieval religious art.