#Catholic tombs of the tombs of the two kings #Royal Chapel before Spain was unified, Isabella I was Queen of Castile and Ferdinand II was King of Aragon. The two later tied the knot, and their marriage was extremely successful both politically and militarily. In the following decades, under the two men, the Moors were expelled from Spain, intervened in the Italian war, and funded the Columbus expedition, which later generations called "the Spanish Catholic Twin Kings." It can be said that Spain became a global power after the 15th century, and the Catholic two kings were a great power.