Right at the confluence of the mighty Rhine and Moselle rivers, in the historic district of the German Corner, lies the oldest Catholic church in the city of Koblenz. This landmark is an outstanding example of Romanesque architecture, preserving the spirit of the early Middle Ages and becoming an important symbol of Germany.

The Basilica of St. Castor impresses with its harmonious blend of austere Romanesque forms and later Gothic elements, such as its characteristic pointed towers. Inside the three-aisled church, an atmosphere of tranquility prevails, and the authentic interior is adorned with ancient frescoes and an elegant altar. The primary relic held here is the reliquary of Saint Rizza, daughter of Emperor Louis the Pious.
Today, the basilica is listed as a cultural monument and consistently attracts tourists not only for its historical significance but also for its picturesque location. An ancient fountain stands before the church entrance, and high ratings and positive traveler reviews only confirm that this site is a must-visit for everyone who values the harmony of history and architecture.