 In 1088, he was present at the duke's making of a donation to SS Trinità di Venosa and he made his own in 1089.Henry was a prolific donor to Benedictine monasteries, endowing, besides Venosa, Montecassino, La Trinità della Cava, S. Sofia di Benevento, and S. Giovanni in Lamis.For every year between 1089 and 1096, save 1091, all his documents use imperial dating.