Otto died in 991, as known by the foundation act of his son for the monastery of Spigno, which Otto himself had planned on building.
Casale Monferrato | Nizza Monferrato | Cuccaro Monferrato | Villanova Monferrato | Spigno Monferrato | Ozzano Monferrato | Cerrina Monferrato | Castagnole Monferrato |