Arabic to English Art/Literary History History of the Islamic Civilization

This is the entire sentence:

و الا فلو استقصينا كل ما اثر المسلمون في الارض من رائع و بديع لم تسع ذلك الجلود الكثيرة, المرصوفة طبقا فوق طبق

I'm having trouble figuring out the entire sentence actually, but particularly this phrase. It's from an excerpt of a book about the history of Islamic civilization.