Lino Moretti in Tassini, p. 743: S. Lorenzo n. 3. Francesco Sansovino e Giustiniano Martinioni [con aggiunta di], Venetia città nobilissima et singolare
negotiations, dividing the kingdom of Vestfold with his half-brother Olaf. Giustiniano Participazio, doge of Venice, dies after a 2-year reign, and is succeeded
Agnello, had appointed him co-doge while his brother Giustiniano was away in Constantinople. When Giustiniano returned, Agnello was deposed and Giovanni, who
recorded in Venice as early as the ninth-century in both the will of Doge Giustiniano Participazio (in office 827–829) and the travelogue of a Frankish monk