Original: When the Caliphate dissolved in 1031 , the territory split into small Taifas , and gradually the Christian kingdoms started the Reconquest up to 1492 , when Granada , the last kingdom of Al-Andalus fell under the Catholic Monarchs .
Simplified: In 1031 the territory split into small territiries , and gradually the Christian kingdoms started the Reconquest up to 1492 , when Granada , the last kingdom of Al - Ã ndalus fell under the Spanish Kings .