The Cologne Ring (known in German as: Kölner Ringe) is a semi-circular, some 6 km long urban boulevard in Innenstadt, Cologne and the city's busiest and most prominent street system. The Cologne Ring is a four lane street and part of Bundesstraße 9.
The ring road encircles the old town of Cologne on its southern, western and northern boundaries on the site of the former medieval city wall. It divides Innenstadt into old town (Altstadt) east of it and new town (Neustadt) west of it. Most of the city wall has been worked away during the 1880s and only few sections of the wall exist today at Hansaring and Sachsenring. Of the once twelve medieval city gates, only the Eigelsteintorburg at Ebertplatz, the Hahnentor at Rudolfplatz and the Severinstorburg at Chlodwigplatz still stand today.