Ulrich of Zell, also known as Wulderic, sometimes of Cluny or of Regensburg (c. 1029 – 1093), was a Cluniac reformer of Germany, abbot, founder and saint.

His father Bernhold was from Bavaria; his mother Bucca from Swabia, a niece of Bishop Gebhard II of Regensburg and also related to Ulrich of Augsburg.

Pious and wealthy, they were childless for many years and made a pilgrimage to Magnus of Füssen, vowing to dedicate a son to the religious life.

[1] Ulrich was probably educated at the school of St. Emmeram's Abbey, along with William of Hirsau, with whom he remained friends throughout his life, but in 1043 he was called to the court of his godfather, Henry III, King of the Germans where he acted as page to Queen Agnes, who was of the ducal house of Aquitaine, patrons of the reforming Abbey of Cluny.

[1] Ordained deacon by his uncle Nidger, Bishop of Freising, he was made archdeacon and provost of the cathedral there,[2] but was deeply moved by the spirit of reform that was sweeping from Cluny through the 11th century church.

The following year, due to troubles with Bishop Burchard von Oltingen, a partisan of Henry IV, whom he had accused of breaking celibacy, Ulrich returned again to Cluny, where he acted as adviser to the abbot.

Not finding the locality suitable, he and his monks moved in 1087 to Zell, in the Möhlin valley, where there had previously been a cell of the Abbey of Saint Gall.