Science·Later empires
Death of Nasir al-Din al-Tusi near Baghdad
- Date
- June 1274 CE672 AH752 years ago
- Place
- Baghdad, Ilkhanid Iraq
- People
- Nasir al-Din al-Tusi, Hulagu Khan
Nasir al-Din al-Tusi died near Baghdad in June 1274. He had directed the Maragheh observatory for Hulagu Khan. He wrote on astronomy, ethics and mathematics. His geometric device, known as the Tusi couple, was later used in Islamic and European astronomy. His ethical treatise, Akhlaq-i Nasiri, stayed widely read in Persian-speaking lands.
Why it matters
The Tusi couple, a geometric device, was later used in European and Islamic astronomy.