The Treaty of Medina del Campo was an agreement developed on March 26, 1489 between England and the nascent Spain. Its provisions accomplished three goals: the establishment of a common policy for the two countries regarding France, the reduction of tariffs between the two countries, and, most centrally, the arrangement of a marriage contract between Arthur Tudor, eldest son of Henry VII of England, and Catherine of Aragon, daughter of Isabella I of Castile and Ferdinand II of Aragon. The treaty was signed on March 27 by Spanish sovereigns, but its ratification by Henry did not occur until September 1490 by the Treaty of Woking.