Austrian Archduchess and Infanta of Castile, a member of the House of Habsburg by birth, who subsequently became Queen consort of Portugal (1518–1521) and of France (1530–1547) both by marriage. She also held the Duchy of Touraine (1547–1558) in dower. She is called “Leonor” in Spanish and Portuguese and “Eléonore” or “Aliénor” in French. She was named after her paternal great-grandmother, Eleanor of Portugal, Holy Roman Empress.
Eleanor was the eldest child of Felipe/Philip of Austria and Juana/Joanna of Castile, who would later become co-sovereigns of Castile. Her father was also the son of the reigning Holy Roman Emperor Maximilian I and his deceased consort Mary of Burgundy, while her mother was the daughter of the Catholic Monarchs; namely Ferdinand of Aragon and Isabella of Castile.
Her siblings were Holy Roman Emperor Charles V, Holy Roman Emperor Ferdinand I, Queen Isabella of Denmark, Queen Mary of Hungary and Queen Catherine of Portugal.
Eleanor married her uncle by marriage, King Manuel I of Portugal, on 16 July 1518. They had two children: the Infante Charles (18 February 1520 – 15 April 1521) and the Infanta Maria (born 8 June 1521, and who was later one of the richest princesses of Europe). She became a widow on 13 December 1521, when Manuel died of the plague. As Queen Dowager of Portugal, Eleanor returned to the court of Charles in Spain.
In 1529, by the treaty called “La Paz de las Damas” (The Ladies’ Peace), it was stipulated that she should marry King Francis I of France. They wed on 4 July 1530. They had no children.
Eleanor was crowned Queen of France in Saint-Denis on 31 May 1531. She was ignored by Francis, who seldom performed his marital obligations and preferred his lover Anne de Pisseleu d’Heilly. Eleanor died on 25 February 1558 at age 59 in Talavera la Real, Badajoz.

Link to Wikipedia biography