Fort of Giribita

The Fort of Giribita, also referred to as the Fort of Our Lady of Porto Salvo and the Fort of Ponta do Guincho, is located on the right bank of the Tagus estuary, in the municipality of Oeiras, District of Lisbon, in Portugal. It was completed in 1649 during the Portuguese Restoration War, as part of the fortifications of Lisbon that stretched from Cabo da Roca on the Atlantic coast to Belém Tower close to Lisbon. It could exchange crossfire with the Fort of São Bruno to its east.

Source: Wikipedia