Konrad von Hochstaden (*1198/1205 - September 18, 1261 in Cologne) was Archbishop of Cologne. He was the son of Lord Lothar von Hochstaden who was the canon of St. Maria ad Gradus and of the Cologne Cathedral. After 1238, Konrad became one of the most powerful princes of Germany. He started the building of the new Cologne Cathedral in 1248. September 18 is the 261st day of the year (262nd in leap years). ... Events July 25 - Constantinople re-captured by Nicaean forces under the command of Michael VIII Palaeologus, Byzantine Empire re-formed August 29 - Urban IV becomes Pope, the last man to do so without being a Cardinal first Bela IV of Hungary repels Tatar invasion Charles of Anjou given rule of... Cologne skyline at night. ... The Archbishopric of Cologne was one of the major ecclesiastical principalities of the Holy Roman Empire. ... The rear of the cathedral, viewed from across the Rhine Cologne Cathedral (German: Kölner Dom) is one of the best-known architectural monuments in Germany and has been Colognes most famous landmark for centuries. ... Events In the Iberian peninsula, James I of Aragon captures the city of Valencia September 28 from the Moors; the Moors retreat to Granada. ... Events Louis IX of France departs on the Seventh Crusade for Egypt Kingdom of Castile captures city of Seville from Muslims Cologne cathedral: old cathedral burns down April 30; foundation stone to current cathedral laid August 15 Births Deaths January 4 - King Sancho II of Portugal, in exile in Toledo...