Ulrich of Lenzburg

Ulrich of Lenzburg, also called Ulrich Ribi (died 25 March 1355), was an Augustinian hermit in Mainz before becoming bishop of Chur in 1331. As a papal penitentiary he had opposed Emperor Louis IV, and in 1338 he was sent to Avignon to mediate with Benedict XII.

In the wars over Tyrol he allied with Charles IV of Bohemia; in 1347 Louis of Brandenburg captured him and seized Chur's Tyrolean lands. In 1352 and 1354 he backed Albert II of Austria against the Swiss.