Paçô Fort, also called Fortim de Montedor or Carreço Fort, is a small 17th-century coastal fortification located on a rocky outcrop next to Paçô Beach (or Praia dos Ingleses). Commissioned by D. Pedro I after the Restoration Wars (1640-1689) – which affirmed Portugal's independence from Spain – it was completed in 1703 as part of a military defence line along the Minho River and the Atlantic coast. With a star-shaped layout and low walls facing the sea, it was equipped with artillery and was intended to protect the coast from maritime incursions. In 1967, it was classified as a Monument of National Interest in recognition of the historical and architectural importance of this building, which is now in ruins.