Complex sentence: Another influence was the minority Jewish population in some cities, but after the defeat of the Muslims during the Christian "Reconquista" ("Reconquest") period between 1000 and 1492, Spain became an almost entirely Roman Catholic country.
Split into simpler sentences: Another influence was the minority Jewish population in some cities. After the defeat of the Muslims during the Christian "Reconquista" ("Reconquest") period between 1000 and 1492, Spain became an almost entirely Roman Catholic country.