[1] He succeeded Pietro I Candiano, following a brief period during which the elderly and infirm Giovanni II Participazio administered the city.

Finally, advancing past Chioggia and Pellestrina towards Malamocco, the Magyars arrived at Albiola to meet a vast Venetian host under Tribuno awaiting them.

He constructed a vast wall from eastern Olivolo to the Riva degli Schiavoni and thence to Santa Maria Zobenigo.

He also stretched a gigantic chain across the Grand Canal from S. Gregorio on Dorsoduro to a site now occupied by the Palazzo Gaggia.

According to the chronicler John the Deacon, writing a century later, with the construction of this wall Venice became a civitas, often translated "city;" an event marking a turning point in Venetian history.