Cologne Cathedral as seen from the air with the Rhine River at the top of the picture.

Cologne Cathedral (German: Hohe Domkirche St. Petrus or commonly Kölner Dom) is a Roman Catholic cathedral in Cologne, Germany. It is the cathedral church for the Roman Catholic Archdiocese of Cologne.

The cathedral has a height of 157.25 metres. This makes it the second-highest in Germany and the third-highest in the world. The cathedral in Ulm, the Ulm Minster at 161 metres is the highest in the world. The Basilica of Our Lady of Peace of Yamoussoukro is also higher, at 158 metres, but it only has the status of a minor basilica, it is not a cathedral.The cathedral is also the third-biggest church, built in Gothic architecture. The Seville Cathedral in Seville, Spain, and the Milan Cathedral in Milan, Italy are bigger.