Philip I (German: Philipp von Heinsberg) (c. 1130 – 13 August 1191) was Archbishop of Cologne and Archchancellor of Italy from 1167 to 1191.
Barbarossa also made Aachen and Duisburg royal cities with trading privileges in order to weaken Cologne economically.
Philip responded by negotiating with Pope Urban III, then at odds with Barbarossa, and Canute IV of Denmark.
Philip also supported the anti-imperial candidate for the archbishopric of Trier, Folmar of Karden, and built a fortress at Zeltingen for this purpose,[1] but the archbishop's wider attempts to unite the German episcopate against the emperor failed.
In 1191 Philip accompanied the new emperor Henry VI to Italy to conquer the kingdom of Sicily on behalf of his wife Constance, and died of an epidemic – either bubonic plague or malaria – during the siege of Naples.
Documents dated 27 July and 18 August of that year attest to the start of work on what was to become the largest city wall in Europe until 1881.