Who Was Alive

Were Harun al-Rashid and Muḥammad ibn Musa al-Khwarizmi alive at the same time?

Yes. Harun al-Rashid and Muḥammad ibn Musa al-Khwarizmi were alive at the same time, from c. AD 780 to AD 809.

Harun al-Rashid

5th Abbasid caliph

Born 19 February AD 766 · died 24 March AD 809, aged 43

Muḥammad ibn Musa al-Khwarizmi

9th-century Persian mathematician and astronomer

Born c. AD 780 · died c. AD 850

Harun al-Rashid and Muḥammad ibn Musa al-Khwarizmi in bold, with some of their best-known contemporaries. Drag across to see the age each reached in any year. Faded ends mark uncertain dates.