Lisbon was a pre-War city.
In February 1894, Lorenzo Cabot traveled across the Atlantic Ocean to Lisbon, a stop during his expedition to Ubar to locate and prove the existence of ancient civilizations. There he met Metternich, who had perfected a electrical sensing apparatus.
Lisbon is mentioned only in Fallout 4.
Behind the Scenes
Lisbon is based on the real world location of the same name, and is the capital of Portugal.