Spanish galleons were large sailing ships used by Spain from the 16th to the 18th centuries. They were primarily designed for trade and warfare, featuring a robust hull and multiple decks. These ships played a crucial role in transporting goods, such as silver and gold, from the Americas to Europe, especially during the Spanish Empire's height. Galleons were also equipped with cannons for defense against pirates and rival nations. Their design evolved over time, incorporating advancements in navigation and shipbuilding. The most famous route for these vessels was the Spanish treasure fleet, which connected Spain with its colonies in the New World.