lostislamichistory.com

E0P0 TIL During the Mongols sack of Baghdad they destroyed the fabled House of Wisdom and threw so many books into the Tigris that it ran black from the ink
Bdad TIL that in 1000, Spain had over 5,000,000 Muslims. By 1614, every Muslim was either forced to convert, leave, or be killed by Catholic monarchs.