 Otto I was firmly in charge of Italy.Betrolini notes that various historians think that there was an alliance between Otto I and Pietro IV and that this is indicated by Pietro's marriage to Waldrada, a relative of Otto, and the fact that in 963 Otto I confirmed the monastery of San Zaccaria's property in the county of Padua in favour to its abbess Giovanna, who was probably Pietro's first wife, and granted tax assets in the county of Treviso to a Vitale Candiano, whom they identify as Pietro's brother (both counties were in the Kingdom of Italy).Guido Mor disagrees with this interpretation.