Prisoners of war from both sides (those taken at Negroponte by the Ottomans and at Gallipoli by the Venetians) were exchanged.[7] The Duchy of the Archipelago was recognized as an independent party.[7] The rights of both parties to trade in each other's territories were affirmed.[7] The Sultan recognized, by name, Venetian control over 38 fortresses, islands, and localities in the Aegean and the coasts of the Balkans.[7] Venice promised to pay an annual tribute of 100 ducats to the Sultan for control of Lepanto, and of 200 ducats for Alessio, Drivasto, and Scutari.[8]