▁controlled ▁at ▁various ▁points ▁parts ▁of ▁Southern ▁Italy ▁and ▁most ▁of ▁modern ▁Spain ▁and ▁Portugal , ▁as ▁well ▁as ▁the ▁B alk ans , ▁all ▁of ▁which ▁retained ▁large ▁Christian ▁populations . ▁The ▁Christian ▁Cr us aders ▁equally ▁ruled ▁Islam ic ▁populations . ▁Cr us ader ▁art ▁is ▁mainly ▁a ▁hy brid ▁of ▁Catholic ▁and ▁By z antine ▁styles , ▁with ▁little ▁Islam ic ▁influence , ▁but ▁the ▁Moz arab ic ▁art ▁of ▁Christians ▁in ▁Al ▁And al uz ▁seems ▁to ▁show ▁considerable ▁influence ▁from ▁Islam ic ▁art , ▁though ▁the ▁results ▁are ▁little ▁like ▁contemporary ▁Islam ic ▁works . ▁Islam ic ▁influence ▁can ▁also ▁be ▁trac ed ▁in ▁the ▁main stream ▁of ▁Western ▁medieval ▁art , ▁for ▁example ▁in ▁the ▁Roman es que ▁portal ▁at ▁Mo iss ac ▁in ▁southern ▁France , ▁where ▁it ▁shows ▁in ▁both ▁decor ative ▁elements , ▁like ▁the ▁scal loped ▁edges ▁to ▁the ▁door way , ▁the ▁circular ▁decor ations ▁on ▁the ▁l int el ▁above , ▁and ▁also ▁in ▁having ▁Christ ▁in ▁Majesty ▁surrounded ▁by ▁mus icians , ▁which ▁was ▁to ▁become ▁a ▁common ▁feature ▁of ▁Western ▁heaven ly ▁scenes , ▁and ▁probably ▁der ives ▁from ▁images ▁of ▁Islam ic ▁k ings ▁on ▁their ▁di wan . ▁Call ig raph y , ▁orn ament ▁and ▁the ▁decor ative ▁arts ▁generally ▁were ▁more ▁important ▁than ▁in ▁the ▁West . ▁ ▁The ▁His p ano - M ores que ▁pot tery ▁war es ▁of ▁Spain ▁were ▁first ▁produced ▁in ▁Al - And al uz , ▁but ▁Muslim ▁pot