These dukes all bore the name of Godfrey (Godefroy) and the fifth of them was the great crusader.
His descendants made themselves quasi-independent and called themselves princes of Sedan and dukes of Bouillon, and they were even recognized by the king of France.
In 1717, however, Cardinal Alberoni retook Cagliari for Spain; but this state of things was short-lived, for in 1720, by the treaty of London, Sardinia passed in exchange for Sicily to the dukes of Savoy, to whom it brought the royal title.
The old castle of Schwanenburg (formerly the residence of the dukes of Cleves), has a massive tower (Schwanenturm) 180 ft.
He took part in the nomination of the counts and dukes; in the king's absence he presided over the royal tribunal; and he often commanded the armies.