'Clausener Bréck' means the Clausen bridge, over the Alzette.
The Alzette runs right through Clausen. The quarter's name comes from a 'Klaus', a hermitage, that stood where Peter Ernst of Mansfeld built his castle La Fontaine; for it he had the river's course changed. In 1916 a new bridge was built and the old Alzette bridge in Clausen rebuilt, on the main road towards Wasserbillig.