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- Anonymous1 decade agoFavorite Answer
"Charles V 1500 — 1558) was ruler of the Holy Roman Empire from 1519 and, as Charles I of Spain, of the Spanish realms from 1506 until his abdication in 1556. He was the grandson of Ferdinand and Isabella, both monarchs in their own right who ruled together but each as rulers of their own kingdom (Aragon and Castile respectively). The Castilian and Aragonese Cortes took oath to him as co-king with his mother (the daughter of F&I). Upon her death, he became sole King of Castile and Aragon, and the thrones were thereafter united permanently."
"As the first king to reign in his own right over both Castile and Aragon following the end of the Reconquista, he is often considered as the first King of Spain."Source(s): http://en.wikipedia.org/wiki/Charles_I_of_Spain http://en.wikipedia.org/wiki/List_of_Spanish_monar...
- ValfrøyaLv 61 decade ago
king juan carlos