Historical Events
- May 28 Severinus begins his reign as Catholic Pope (elected in 638)
- Jun 6 Arab Muslim army sent by Caliph Omar begins siege of Heliopolis, city succumbs mid to late July, paving way for Muslim conquest of Byzantine Egypt
- Dec 24 John IV begins his reign as Catholic Pope
Famous People Who Died in 640 AD
- Mar 2 Bilal ibn Rabah, Arabic companion of prophet Muhammad, first mu'azzin in history, (b. 580)
- Jul 18 Arnulf, bishop of Metz (614-640)/politician, dies at about 58
- Aug 2 Severinus, Italian Pope (640), dies
- Nov 27 Saint Acharius of Noyon, French bishop of Noyon–Tournai, dies of natural causes