Catherine of Aragon is formally betrothed to Arthur, Prince of Wales, at the age of three.
On March 27, 1489, the Treaty of Medina del Campo betrothed three-year-old Catherine of Aragon to Arthur, Prince of Wales, marking a crucial political alliance between Spain and England. This arrangement was designed to solidify ties between the two powerful kingdoms, promising mutual support against France and aiding in the enforcement of maritime peace. The betrothal was significant as it positioned Catherine, even at a tender age, at the heart of European diplomacy. This diplomatic contract underscored the strategic importance of Catherine's marriage in broader geopolitical terms, setting the stage for her future as Queen of England.