 Meanwhile, the opposition in the west took on a dramatic scale, when the dukes of Brabant and Limburg joined forces with Archbishop Bruno III of Cologne.A massive confederacy against the emperor loomed ahead, including Archbishop Conrad of Mainz, Archchancellor of Germany, and Duke Ottokar I of Bohemia, as well Henry's old rival Henry the Lion, the Swabian House of Zähringen, the English Crown, and the pope, irritated by the killing of Albert of Louvain.At this stage, Henry had a stroke of good fortune when the Babenberg duke Leopold V of Austria gave him his prominent prisoner, Richard the Lionheart, King of England, whom he had captured on his way back from the Third Crusade and arrested at Dürnstein Castle.