Abbot Waldo (786-806) made him head of the monastic school, and in this capacity he did much for the instruction and classical training of the monks, as well as for the growth of the library.
[3] When Waldo was transferred to the Abbey of Saint Denis, near Paris, in 806, Haito was made Abbot of Reichenau, and about the same time bishop of Basel.
He rebuilt the cathedral of Basel and the abbey church of Reichenau, and issued appropriate instructions for the guidance of clergy and people in the ways of religion.
[5] In 823 he resigned both positions, owing to serious infirmities, and spent the remainder of his life as a simple monk in the monastery of Reichenau where he died on 17 March 836.
The day before his death (4 November 824) Wettin saw in a vision bad and good spirits; an angel took him through hell, purgatory, and heaven, and showed him the torments of the sinners and the joys of the saints.
[6] While Bishop of Basel, he issued a number of regulations in twenty-five chapters, known as the Capitulare Haitonis, in which he legislated on matters of diocesan discipline.