The twelve Romanesque churches of Cologne are twelve landmark churches in the Old town (Altstadt) of Cologne, Germany. All twelve churches are Catholic.
The reason for the large number of churches was that in the Middle Ages Cologne was, along with Paris, the largest and most important city north of the Alps, and both were already important centers in Roman antiquity (Cologne's name was Colonia Claudia Ara Agrippinensium, the provincial capital of Germania Inferior). Christianity also has a long tradition in both cities; the first bishop of Paris was the missionary Dionysius of Paris (around 250), the first bishop of Cologne was Maternus of Cologne (c. 285-315 AD), a close confidant of Roman Emperor Constantine the Great.
