873 deaths

Abū Yūsuf Yaʻqūb ibn ʼIsḥāq aṣ-Ṣabbāḥ al-Kindī (; ; ; ) was an Arab polymath who was active as a philosopher, mathematician, physician, and music theorist. Al-Kindi was the first of the Islamic peripatetic philosophers, and is hailed as the "father of Arab philosophy".

Arab Christian scholar, physician and scientist (809–873)

Persian brothers, mathematicians and astronomers

Count of Portugal

emperor of the Tang Dynasty

Northumbrian monarch

Spanish noble

Archbishop of Cologne in Germany

Duke of Thuringia

Shia theologian and jurist

Viking leader

Irish king

governor of Syria (Bilad al-Sham)