The Mansouri Great Mosque or the is a mosque in Tripoli, Lebanon, also known simply as The Great Mosque of Tripoli. It was built in the Mamluk period, from 1294 to 1314, around the remains of a Crusader Church of St. Mary.[1][2][3] In any case, the two Christian elements in no way detract from the traditional Muslim nature of this great royal mosque, the first building erected in Mamluk Tripoli.