Cologne Charterhouse (German: Kölner Kartause) was a Carthusian monastery or charterhouse established in the Severinsviertel district, in the present Altstadt-Süd, of Cologne, Germany. Founded in 1334, the monastery developed into the largest charterhouse in Germany until it was forcibly dissolved in 1794 by the invading French Revolutionary troops. The building complex was then neglected until World War II, when it was mostly destroyed. The present building complex is very largely a post-war reconstruction.