Venetia existed within the Exarchate of Ravenna, as part of the Byzantine Empire, and what happened in the Exarchate mattered to Venetia.
The account of the election of the first three doges of Venice (Pauluccio, Marcello and Orso), from the anonymous “Chronicon Altinate”.
The first doges, from the “Chronica per extensum descripta” (1340s) by Andrea Dandolo.