page_title: 9th century
section_title: Significant people
hierarchical_section_title: 9th century / Significant people
caption_attribution_description: Saint Climent of Ohrid Български: Св. Климент Охридски
context_page_description: The 9th century was a period from 801 to 900 in accordance with the Julian calendar.
  The field of algebra was founded by the Muslim polymath Al-Khwarizmi.
  The battle between the Abbasid Caliph Al-Ma'mun and Islamic Scholar Ahmad ibn Hanbal occurred.
context_section_description: Ahmad bin Hanbal, Mujaddid and founder of Hanbali school
  Al-Khwarizmi, founder of Algebra
  Adi Shankara, An Indian philosopher and theologian who consolidated the doctrine of Advaita Vedanta. He is credited with unifying and establishing the main currents of thought in Hinduism.
  Alfonso III of Asturias, king of Asturias, Galicia and León.
  Al-Jahiz
  Alfred the Great
  Arnulf of Carinthia
  Árpád, Grand Prince of the Magyars
  Basil I the Macedonian (Βασίλειος Α') (811–886), ruled (867)–(886)
  Boris I of Bulgaria
  Empress Irene of Athens
  Charlemagne
  Clement of Ohrid
  Han Yu
  Harald I of Norway
  Huang Chao
  Harun al-Rashid
  Ivar the Boneless
  Jayarasi Bhatta, philosophical skeptic
  John Scotus Eriugena, Irish philosopher
  Krum, Khan of Bulgaria
  Kenneth I of Scotland
  Li Deyu
  Louis the Pious
  Muḥammad ibn Mūsā al-Khwārizmī
  Naum of Preslav
  Niu Sengru
  Ordoño I of Asturias,  King of Asturias
  Rurik
  Samaale, Father of the Somalis
  Simeon I of Bulgaria
  Saints Cyril and Methodius
  Emperor Theophilus of Amorium
  Zhu Wen
  Wang Kon
  Wang Xianzhi
  Emperor Xianzong of Tang
  Emperor Xuānzong of Tang
caption: Saint Clement of Ohrid
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