Ferdinand II of Aragon

Ferdinand II of Aragon married Isabella I of Castile in Valladolid, uniting the two largest Christian kingdoms in Spain. This marriage created the basis for the Kingdom of Spain, though both crowns remained legally separate until the death of Isabella in 1504.

Ferdinand II and Isabella I obtained papal approval to establish the Spanish Inquisition, a tribunal to enforce Catholic orthodoxy. The Inquisition targeted converted Jews (conversos) and Muslims (moriscos) suspected of secretly practicing their former religions, leading to thousands of executions and imprisonments.

Ferdinand II and Isabella I completed the Reconquista by capturing the city of Granada, the last Muslim stronghold in the Iberian Peninsula. The surrender of the Nasrid kingdom ended nearly 800 years of Muslim rule in Spain and marked a major victory for the Catholic Monarchs.

Ferdinand II and Isabella I issued the Alhambra Decree, ordering the expulsion of all Jews from the kingdoms of Spain who refused to convert to Catholicism. The decree led to the exile of an estimated 200,000 Jews, causing a significant demographic and economic impact on Spain.