The modern history of the city starts around the late 15th century. It was re-built and fortified by Ali al-Mandri, who emigrated from the Andalusian city of Granada in the decade before it fell in the hands of the Catholic Monarchs Ferdinand II of Aragon and Isabella I of Castile during the Spanish Reconquista of 1492. Thousands of Muslims and Jews from Andalusia settled in the north of Morocco and on the ruins of the city of Tétouan. The city went through a prosperous period of reconstruction and growth in various fields and became a center for the reception of Andalusian civilization. It is often linked to Granada and is labelled Granada's daughter; some families still keep keys belonging to their old homes in Granada. It is also nicknamed "Pequeña Jerusalén" (Little Jerusalem) by Sephardi Jews. The vast majority of the population are Muslims and small Christian and Jewish communities also exist, although their presence has declined sharply in recent decades.