The earliest written source related to the inhabitants of the Venetian lagoons, is a letter from Cassiodorus, written in 537.
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.