The Treaty of Alcaçovas was an agreement between Portugal and Castile where ownership of the Canary Islands was transferred to Castile in exchange for claims in West Africa. The treaty went into effect on March 6, 1460. A former kingdom of Spain, Castile comprises the two regions of Old Castile in north-western Spain, and New Castile in the centre of the country. ... Capitals Las Palmas de Gran Canaria Santa Cruz de Tenerife Area  – Total  – % of Spain Ranked 13th  7 447 km  1,5% Population  – Total (2003)  – % of Spain  – Density Ranked 8th  1 843 755  4,4%  247,58/km Demonym  – English  – Spanish Canary Islander canario/a Statute of Autonomy August 16, 1982... West Africa is the region of western Africa generally considered to include these countries: Benin Burkina Faso Cameroon Côte dIvoire (Ivory Coast) Equatorial Guinea Gabon The Gambia Ghana Guinea Guinea-Bissau Liberia Mali Niger Nigeria Republic of the Congo (Congo-Brazzaville) Senegal Sierra Leone Togo Chad, Mauritania, and... March 6 is the 65th day of the year in the Gregorian Calendar (66th in Leap years). ... Events The first Portuguese navigators reach the coast of modern Sierra Leone. ...