Marino Dandolo is first attested as a witness in Constantinople in 1195.
[1] He served as ducal councillor in 1207/08, as ambassador to the King of Germany, Otto IV, in 1209, and again as ducal councillor in 1210/11.
[1] Dandolo is next attested as the Venetian Podestà of Constantinople in spring 1214, meaning that his tenure—usually of two years—was sometime between 1214 and 1216.
[1] In 1224 he was involved in an investigation on the embezzlement of funds during this time in office at Constantinople, but not personally accused.
[1] During the ducal election of 1229, he was a candidate, but lost to Jacopo Tiepolo.