worldhistory.org

5VxPR TIL some of the first Islamic coins had Zoroastrian fire temples and a Sassanid King of Kings on them
R5468 TIL that, during Egypt's early dynasties, rulers were entombed in flat-topped monuments made of clay-brick called mastabas. Imhotep conceived of building a more impressive tomb for his king by stacking mastabas on top of one another, progressively making them smaller, to form Egypt's first pyramid.
j6Eop TIL: To win a battle against the Egyptians, the Persians carried cats which the Egyptians considered sacred and would not harm. This gave the Persians an inital battlefield edge.