the visigoths converted from arian christianity to roman catholics. muslims who were arab and berber invaded in 711 and conquered spain in 718. they called it al-andalus. roman catholics eventually decided to fight to take spain back from the muslims. they fought wars called the reconquista for more than seven hundred years. they also fought crusades against other christians like the cathars. the moors also fought each other for control of al-andalus.