930

By place

Europe

• Summer - The Althing, the parliament of Iceland, is established at þingvellir. Chieftains from various tribes assemble for 2 weeks to settle disputes, arrange marriages, etc.; it continues in existence into the 21st century, as the world's oldest parliament of the Icelandic Commonwealth.
• Bishopwearmouth is formed and settled in England, after Æthelstan grants the lands to the Bishop of Durham.
• Gilbert, Duke of Lorraine besieges Douai in West Francia.

  Arabian Empire

• Hajj - Qarmatians, led by Abu Tahir al-Jannabi, sack Mecca, desecrating the Zamzam Well, and carrying off the Black Stone.
• Mardavij ibn Ziyar is sent by Asfar ibn Shiruya along with his brother Shirzad, to capture the fortress of Shamiran in Tarom, the capital of the Sallarid ruler Muhammad ibn Musafir. During the siege Mardavij is persuaded to revolt against Asfar, by letters from Makan ibn Kaki. With the help of the sons of the Sallarid, he kills other members of his tribe, including Shirzad. Mardavij founds the Ziyarid Dynasty and becomes the ruler of Asfar's former territories, which includes Rey, Qazvin, Zanjan, Abhar, Qom and Karaj.

  Asia

• October 16 - Emperor Daigo, being fatally ill, abdicates in favor of his 7-year-old son Suzaku, after a 33-year reign. He enters the Buddhist priesthood, but dies shortly after. Former Emperor Uda, remains the power behind the Japanese throne.
• The independent Korean island state of Usan-guk becomes a protectorate of Goryeo.
• Yelü Bei, prince and elder brother of the Khitan Emperor Tai Zong, leaves for China.