870 deaths

Persian Islamic scholar (810-870)

Abū Isḥāq Muḥammad ibn Hārūn ibn Muḥammad ibn Hārūn al-Muhtadī bi-ʾLlāh (‎; – 21 June 870), better known by his regnal name al-Muhtadī bi-ʾLlāh (Arabic: , "Guided by God"), was the Caliph of the Abbasid Caliphate from July 869 to June 870, during the "Anarchy at Samarra".

Egyptian historian (801-871)

Persian scholar and physician

Poet and Lyricist

Italian noble

legendary Abbess of Coldingham Priory in south-east Scotland

Leading Arab Muslim historian and genealogist

Ceolnoth or Ceolnoþ (; died 870) was a medieval English Archbishop of Canterbury. Although later chroniclers stated he had previously held ecclesiastical office in Canterbury, there is no contemporary evidence of this, and his first appearance in history is when he became archbishop in 833. Ceolnoth faced two problems as archbishop – raids and invasions by the Vikings and a new political situation resulting from a change in overlordship from one kingdom to another during the early part of his archiepiscopate. Ceolnoth attempted to solve both problems by coming to an agreement with his new

Bishop of Paris

Italian admiral