The Doge on the Bucintoro near the Riva di Sant'Elena (painting) in the context of "Solemnity"

The bucentaur (/bjuːˈsɛntɔːr/ bew-SEN-tor; bucintoro in Italian and Venetian) was the ceremonial barge of the doges of Venice. It was used every year on Ascension Day (Festa della Sensa) up to 1798 to take the doge out to the Adriatic Sea to perform the "Marriage of the Sea" – a ceremony that symbolically wedded Venice to the sea.

Scholars believe there were four major barges, the first significant bucentaur having been built in 1311. The last and most magnificent of the historic bucentaurs made its maiden voyage in 1729 in the reign of Doge Alvise III Sebastiano Mocenigo. Depicted in paintings by Canaletto and Francesco Guardi, the ship was 35 m (115 ft) long and more than 8 metres (26 ft) high. A two-deck floating palace, its main salon had a seating capacity of 90. The doge's throne was in the stern, and the prow bore a figurehead representing Justice with sword and scales. The barge was propelled by 168 oarsmen, and another 40 sailors were required to man it.

The Venetian navy (Venetian: Armada) was the navy of the Venetian Republic which played an important role in the history of the republic and the Mediterranean world. It was the premier navy in the Mediterranean Sea for many centuries between the medieval and early modern periods, providing Venice with control and influence over trade and politics far in excess of the republic's size and population. It was one of the first navies to mount gunpowder weapons aboard ships, and through an organised system of naval dockyards, armouries and chandlers was able to continually keep ships at sea and rapidly replace losses. The Venetian Arsenal was one of the greatest concentrations of industrial capacity prior to the Industrial Revolution and responsible for the bulk of the republic's naval power.

Driven at first by a rivalry with the Byzantine Empire, and later the maritime republics of Pisa and Genoa for primacy over trade with the Levant, the Venetian navy was at times technically innovative and yet operationally conservative. With the final fall of Constantinople it played a key role in checking the maritime advance of the Ottoman Empire for over three centuries. The navy's long decline mirrored that of the republic, beginning in the 16th century and ending with the capitulation of the city to Napoleon in 1797.