From the 700s to the 1200s, Baghdad was an Intellectual Cent 3 11, 8:18pm

@PaxRomana agreeably a bad source, but fortunately, facts are independent from their source. See this section in the wikipedia article: https://en.wikipedia.org/wiki/House_of_Wisdom#Translation , or, better yet, one of its sources: "The Classical Heritage in Islam" by Franz Rosenthal.