Byzantines were mostly Near Easterns right??? well If you look at any christian monument in Spain and most islamic monuments in Spain you'll notice that they were made by very different people they look like day and night Romans,Visigoths,Greeks,Byzantines and Mesopotamians gave alot of influences to most of the known world so it's not surprising if they use and if they took some old visigoth buildings and converted them into moorish places and mosques the same the Catholics kings did to moorish monuments that means nothing also moorish architecture is more similar to Maghrebian architecture than Near Eastern architecture...anyway moorish is too "barroco" for the Spanish mentality to crate it,moors are more barrocos and that type of art suits them best just look at the Spanish woman and the Maghrebi woman