Video on the making of the model ship which had 140 cannon during the battle of Trafalgar by Eugenio Monesma Documentaries: The Spanish ship with 140 cannons at the Battle of Trafalgar was the Nuestra Señora de la Santísima Trinidad. As the largest warship in the world at the time, this four-deck, first-rate ship of the line served as the flagship for Admiral Baltasar Hidalgo de Cisneros. It was captured by the British in October 1805 but sank shortly after. Key Details About the Santísima Trinidad: - Armament: Upgraded to 140 guns in 1802. - Role: Flagship of the Spanish fleet at Trafalgar. - Fate: Heavily damaged and captured, but scuttled on 22 October 1805, due to damage sustained in a storm. - Nickname: Known as El Escorial de los Mares ("The Escorial of the Seas").