Cologne is Germany's fourth-largest city (after Berlin, Hamburg, and Munich), and is the largest city both in the German Federal State of North Rhine-Westphalia and within the Rhine-Ruhr Metropolitan Area, one of the major European metropolitan areas with more than ten million inhabitants.
- WWE Survivor Series Tour 2007 - Cologne - October 13, 2007.
- WWE WrestleMania Revenge Tour 2009 - Köln - April 16, 2009.
- WWE WrestleMania Revenge Tour 2013 - Cologne - April 28, 2013.
- Cologne on Wikipedia