824

By place

Europe

• Battle of Roncevaux Pass: The Basques and Banu Qasi defeat a Frankish expedition, led by Counts Aznar and Ebles, in the Pyrenees.
• Iñigo Arista revolts against the Frankish Empire, and establishes the Kingdom of Pamplona, with the support of the Caliphate of Córdoba.
• November 11 - The Constitutio Romana establishes the authority of the Holy Roman Emperors over the papacy of Rome.

  Britain

• Vikings raid Bangor for the second time, and plunder the bishopric.

  Japan

• Zenpuku-ji, one of the oldest Tokyo temples, is founded by the Japanese Buddhist monk Kūkai.

  By topic

Religion

• February 11 - Pope Paschal I dies after a 7-year reign, and is succeeded by Eugene II, as the 99th pope of the Catholic Church.