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The day it was when he borned 23 Noveber 1221 and he lived 63 year
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So, in 1240, he married Maior Guillen de Guzman, but the marriage was later annulled and their issue declared illegitimate.
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In 1249, Alfonso X married Violante of Aragon, the daughter of King James I of Aragon and Yolande of Hungary, although betrothed already in 1246.
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He succeeded his father as King of Castile and León in 1252.
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In 1254 Alfonso X signed a treaty of alliance with the King of England and Duke of Aquitaine, Henry III, supporting him in the war against Louis IX of France.
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In 1263 Alfonso X returned Algarve to the King of Portugal.
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To obtain money, he debased the coinage and then endeavoured to prevent a rise in prices by an arbitrary tariff. The little trade of his dominions was ruined, and the burghers and peasants were deeply offended. His nobles, whom he tried to cow by sporadic acts of violence, rebelled against him in 1272.
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Reconciliation was bought by Alfonso's son Ferdinand in 1273.
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he died whit 63 year old.