Maria I of Portugal forced Portugal to cede Olivença and other border towns to Spain. (This cession is not recognized by the present Portuguese government, and the country officially considers those territories still to be Portuguese possessions.) On September 29, 1801 John VI signed the Treaty of Madrid (1801), ceding half of Guyana to France, which became French Guiana. The refusal of the Portuguese government to join the French-sponsored Continental Blockade against Britain culminated in the late 1807 Franco-Spanish invasion of Portugal led by General Junot. The ultimate Napoleonic plan for Portugal was to split it into three sections. The northern parts of Portugal,
São Pedro do Sul, Portugal the 6th century BC, lacking streets of right angles and full of construction almost always circular. One of the Castros in São Pedro do Sul is Castro da Cárcoda. In the region exist several Roman bridges and Roman Thermal Spas. São Pedro do Sul was the southern border of the Kingdom of Portugal at the time of the Foundation of the country, being the natural border the river Vouga that's the reason of the name "Saint Peter of South". The first King of Portugal Afonso Henriques lived in São Pedro do Sul while healing is injuries after the battle of