The 1521 capture Tenochtitlan and immediate founding of the Spanish capital Mexico City on its ruins was the beginning of a 300-year-long colonial era during which Mexico was known as ''Nueva España'' (New Spain). The Kingdom of New Spain was created from the remnants of the Aztec empire. The two pillars of Spanish rule were the State and the Roman Catholic Church, both under the authority of the Spanish crown. In 1493 the pope had granted sweeping powers to the Spanish crown, with the proviso that the crown spread Christianity in its new realms. In 1524, King Charles I created the Council of the Indies based in Spain to oversee State power its overseas territories; in New Spain the crown established a high court in Mexico City, the ''Real Audiencia,'' and then in 1535 created the viceroyalty. The viceroy was highest official of the State. In the religious sphere, the diocese of Mexico was created in 1530 and elevated to the Archdiocese of Mexico in 1546, with the archbishop as the head of the ecclesiastical hierarchy, overseeing Roman Catholic clergy. Castilian Spanish was the language of rulers. The Catholic faith the only one permitted, with non-Catholics (Jews and Protestants) and Catholics (excluding Indians) holding unorthodox views being subject to the Mexican Inquisition, established in 1571.