 They also captured the nearby Castle of Risan and later assaulted the Venetian fortress of Cattaro and the Spanish fortress of Santa Veneranda near Pesaro.The Turkish fleet later took the remaining Christian outposts in the Ionian and Aegean Seas.Venice finally signed a peace treaty with Sultan Suleiman the Magnificent in October 1540, agreeing to recognize the Turkish territorial gains and to pay 300,000 gold ducats.