History of the Republic of Venice and his dogeship was marked by the expansion of Venice towards the sea via the construction of bridges, canals, bulwarks, fortifications, and stone buildings. The modern Venice, at one with the sea, was being born. Agnello was succeeded by his son Giustiniano, who brought the body of Saint Mark the Evangelist to Venice from Alexandria and made him the patron saint of Venice. During the reign of the successor of the Participazio, Pietro Tradonico, Venice began to establish its military might which would influence many a later crusade and dominate the Adriatic for centuries, and signed a trade agreement with
Gulf of Batabanó to the Isle of Youth. The gulf is shallow–less than 200 feet (61 m) deep–and contains about 350 smaller islands of the Canarreos Archipelago ("los Archipiélago de los Canarreos") besides the Isle of Youth. The gulf is a center of sponge fishing. Gulf of Batabanó The Gulf of Batabanó (; ), also called the Batabanó Gulf, is an inlet or strait off southwestern Cuba in the Caribbean Sea, separating mainland Cuba from the Isle of Youth. It is located at . The gulf's northern border begins at the southern coast of Cuba in Pinar del Río Province, Artemisa Province, Mayabeque