History of Portugal the Moors in 1249, and in 1255 the capital shifted to Lisbon. Neighboring Spain would not complete its "Reconquista" until 1492, almost 250 years later. Portugal's land boundaries have been notably stable for the rest of the country's history. The border with Spain has remained almost unchanged since the 13th century. The Treaty of Windsor (1386) created an alliance between Portugal and England that remains in effect to this day. Since early times, fishing and overseas commerce have been the main economic activities. During the 15th and 16th centuries, Portugal became a leading European power that ranked with England, France
TAP Air Portugal would lead to Swissair buying a 34% stake of TAP. Also, TAP became a member of Qualiflyer, the frequent-flyer program led by the Swiss flag carrier. Due to financial difficulties, the Swiss company ends up not buying the agreed shares of TAP Air Portugal, unilaterally revoking the partnership agreement which led to unexpected costs for the Portuguese airline in 2000, with the culmination of a legal action taken against Swissair. TAP became a member of Star Alliance on 14 March 2005, the same day on which the company celebrated its 60th anniversary. TAP Air Portugal was re-branded as TAP Portugal