Arnold I of Cologne

After participating in the second election of Conrad III as King of Germany in Coblenz on 7 March 1138, Arnold received his consecration on 3 April 1138.

Some time after this date he had a castle built on the Drachenfels ("Dragon's Rock") in the Siebengebirge mountain range near Bonn.

In 1146 during the Second Crusade, when the monk Radulphe left his monastery in France and travelled to Cologne and the Rhine Valley to preach pogroms against the Jews, Arnold was one of the churchmen who tried most actively to protect them.

He made available to them the castle of Wolkenburg, near Königswinter, which had been built in 1118 by his predecessor archbishop Frederick I to secure his region in the south; and permitted the Jews to arm themselves.

Bernard replied with a strong denunciation of Radulphe, and demanded an end to violence against the Jews.