Rivoalto (Rialto) was in the Middle Ages the common name for the area we now call Venice, which then meant the Duchy of the Venetians.
The dukes Obelerius and Beatus, and the war with the Franks, from the “Chronica per extensum descripta” (1340s) by Andrea Dandolo.
The account of the dukes Obelerius and Beatus, from the “Istoria Veneticorum” by John the Deacon.
Excerpts from the “Annales Regni Francorum” about the Venetian-Frankish conflict in 806–811, translated by René Seindal.
The Chronicon Altinate contains an apocryphal account of how duke Paulicius was killed in a factional fight between people from Equilo and Heraclia.