721

By place

Europe

• February 13 - King Chilperic II dies at Attigny, after a five-year reign. He is succeeded by Theuderic IV, infant son of Dagobert III, as Merovingian ruler of the Franks, under the control of the mayor of the palace, Charles Martel.
• Summer - Charles Martel restores the authority of the Austrasian palace throughout the Frankish Kingdom, including against Frankish-claimed Aquitaine and Provence. He exiles Rigobert, bishop of Reims, to Gascony.
• June 9 - Battle of Toulouse: After besieging Toulouse for three months, Muslim forces under governor Al-Samh ibn Malik al-Khawlani are defeated by Eudes, duke of Aquitaine, preventing the extension of Umayyad control over Gaul.
• Anbasa ibn Suhaym Al-Kalbi is appointed governor of Al-Andalus, after the death of Al-Samh. The Muslims under Abdul Rahman al-Ghafiqi withdraw to Narbonne. The Visigothic duke Amrus of the Lerida area recognises Umayyad rule.
• Tervel, ruler of the Bulgarian Empire, dies after a 21-year reign. He is succeeded by Kormesiy, possibly a son of Tervel, who is co-ruler and a descendant of the royal Dulo clan.
• Prague is founded by Princess Libuše and her husband Přemysl, founder of the Přemyslid dynasty.

  Britain

• King Ine of Wessex defeats Prince Cynewulf, an unknown relation making a push for the throne of Wessex.

  China

• Rains and heavy storms around the southern seaport of Yangzhou destroy over 1,000 ships and boats in the Grand Canal, during the Tang Dynasty.

  By topic

Religion

• Prüm Abbey is founded by Bertrada, daughter of former king Theuderic III, and her son Charibert, count of Laon.