Charles of Austria (or Habsburg) (Ghent, February 24, 1500 – Yuste Monastery, September 21, 1558) was King of Spain under the name of Charles I (1516-1556), the first to unite in his person the crowns of Castile and Aragon, and Holy Roman Emperor as Charles V (1519–1558).
Son of Juana I of Castilla, known as Juana la Loca, and Felipe el Hermoso, and paternal grandson of Maximilian I of Austria (Habsburg) and María de Borgoña (from whom he inherited the Netherlands, the Austrian territories and right to the throne imperial) and the Catholic Monarchs, from whom he inherited the Kingdom of Castile, Naples, Sicily, the Indies, Aragon and the Canary Islands, through his mother.