Eastern end of the Hellweg Road. Paderborn was founded as a bishopric by Charlemagne in 795. In 799 Pope Leo III fled his enemies in Rome and reached Paderborn, where he met Charlemagne. Charlemagne reinstated Leo in Rome in 800 and was crowned as Holy Roman Emperor by Leo in return. The bishop of Paderborn became a Prince of the Empire in 1100.