Rainald von Dassel one of the most powerful princes in the empire.
Rainald von Dassel (* between 1114 and 1120; † August 14, 1167 in Rome) was Archbishop of Cologne from 1159 to 1167 and Arch Chancellor of Italy. He was the closest advisor to Frederick I and had a decisive influence on imperial politics, especially in Italy and in the dispute with the papacy. Although he only spent a little time in the Archdiocese of Cologne, he also had a lasting effect there. His transfer of the bones of the Magi from Milan to Cologne brought a strong flow of pilgrims to the city. This also strengthened Cologne's economic importance.
After conquering Milan in 1164, he brought the bones of the Three Kings, which Barbarossa had given him out of gratitude, to Cologne as spoils of war.