Spanish queen (1451-1504). She married Ferdinand of Aragon in 1469, leading to the unification of Spain's two largest kingdoms, Castile and Aragon, in 1479. During their reign, new roads were built, Spanish coinage was made standard, and the power of the aristocracy was reduced. Spanish law was also codified, and Ferdinand and Isabella themselves took over the administration of justice. They also made war on the Moors, who held part of southern Spain, capturing the Moorish stronghold of Granada in 1492.

Speaking of 1492, Isabella is probably best known in America as one of the few people who saw merit in Christopher Columbus' plan to sail west from Spain to establish a route to the Indies, leading, of course, to Columbus' discovery of America.

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