Artillery piece used during the siege on display in Couceiro Square
The Siege of Lisbon, was a prolonged military operation by the Portuguese Royalist and Spanish Army to capture Lisbon, the capital of Portugal and the last major stronghold of the republic. It started on 8 September 1913, when the last land connection to the city was severed. It was one of the most destructive sieges in history and the most costly in terms of casualties up until the Siege of Leningrad.