Crown of Castile

The Crown of Castile is the most popular name of the Kingdom of Castile and León, a medieval and modern Sovereign state in the Iberian Peninsula that formed in 1230 as a result of the third and definitive union of the crowns and parliaments of the kingdoms of Castile and León upon the accession of the then King Ferdinand III of Castile to the vacant Leonese throne.

It continued to exist as an independent throne after the personal union in 1469 of the crowns of Castile and Aragon with the marriage of the Catholic Monarchs. The Crown of Castile was transformed into a more-or-less unitary state after the reconquest against the Arabs and the subsumption of the crowns of Asturias, Leon, Aragon and Navarre to form a single crown of Castile, with the law of succession and sovereign throne of Castile. Contemporaries and historians called Kingdom of Spain to the peninsular kingdoms always including the kingdom of Castile (see also Emperor of all Spain), ever under the aegis of the throne of Castile and its law of succession, with the mandatory obligation to recognize by their king to the person who was proclaimed sovereign legitimately under the laws of Castile.

The Indias, Islands and Mainland of the Ocean Sea were also a part of the Crown of Castile when transformed from lordships to Kingdoms of the heirs of Castile in 1506, with the treaty of Villafáfila, and upon the death of Ferdinand the Catholic. In the early 18th century, Philip of Bourbon won the War of the Spanish Succession and imposed unification policies over the Crown of Aragon, supporters of their enemies.

The sovereign authority of throne of Castile wasn't formally abolished until Cádiz Cortes, first national sovereign assembly of Spain, when the People of Spain try to impose their national sovereignty to the Americas. The Creoles claimed that their political connection was with the Crown of Castile, and not with the nation of Spain. The new sovereign countries that are considered heirs to the sovereignty of the crown of Castile rejected decisions made without their consent.