Francesco enters historical record as a freebooter or pirate. In 1354, Francesco and his crew landed on Tenedos. The island served at the time as residence to John V Palaiologos, one of three co-emperors to the throne of the Byzantine Empire, the others being his father-in-law John VI Kantakouzenos and brother-in-law Matthew Kantakouzenos. John V and his in-laws were in conflict at the time.