In 1164, Frédéric Barberousse offered the city of Cologne some Relics of the Wise Kings from Milan. Since then, pilgrims have come here. In 1248, a new cathedral was begun, inspired by those in Paris and Amiens. Its construction lasted more than 600 years (1248-1880). The solemn inauguration finally took place in 1880 in the presence of Emperer William I.