The Battle of Orbetello, also known as the Battle of Isola del Giglio, was a major naval engagement of the Franco-Spanish War of 1635. It was fought on 14 June 1646 off the Spanish-ruled town of Orbetello, on the coast of Tuscany, Italy, between a French fleet led by Admiral Armand de Maillé, Marquis of Brézé, and a Spanish fleet commanded by Miguel de Noronha, 4th Count of Linhares sent to break the blockade of Orbetello and relieve the town, besieged since 12 May by a French army under the command of Prince Thomas of Savoy.