853 CE
A Byzantine fleet (85 ships and 5,000 men) sacks and destroys the port city of Damietta, located on the Nile Delta in Egypt. A large quantity of weapons and supplies intended for the Emirate of Crete are captured. Danish Vikings attempt to subjugate the Curonians on the shoreline of the Baltic Sea, but they are repulsed. King Olof leads Swedish Vikings in retaliation, and attacks the towns of Seeburg and Apuolė (modern Courland). The Fraumünster Church in Zürich (modern Switzerland) is founded by Louis the German.
Geopolitics & Diplomacy
- King Charles the Bald bribes Boris I, ruler (khan) of the Bulgarian Empire, to form an alliance against his brother Louis the German, with Rastislav of Moravia.source
Conflict & Security
- May 22 – A Byzantine fleet (85 ships and 5,000 men) sacks and destroys the port city of Damietta, located on the Nile Delta in Egypt. A large quantity of weapons and supplies intended for the Emirate of Crete are captured.source
- Danish Vikings attempt to subjugate the Curonians on the shoreline of the Baltic Sea, but they are repulsed. King Olof leads Swedish Vikings in retaliation, and attacks the towns of Seeburg and Apuolė (modern Courland).source
- King Burgred of Mercia appeals to Æthelwulf, king of the West Saxons, for help against the rebellious Welsh king Rhodri the Great. Æthelwulf agrees to send help, and Wales is subdued as far north as Anglesey.source
Religion & Belief
Science & Discovery
- Tuan Ch'eng-Shih, Chinese author and scholar during the Tang Dynasty, publishes Miscellaneous Offerings from Yu-yang.source
Births
Deaths
- March 27 – Haymo, bishop of Halberstadtsource
- Áilgenán mac Donngaile, king of Munster (Ireland)source
- Virasena, Indian mathematician (b. 792)source
- Theodrada, Frankish abbess, daughter of Charlemagne (or 844)source
- Konstanti Kakhi, Georgian nobleman (b. 768)source
- Ishaq ibn Isma'il, emir of Tbilisi (Georgia)source
- Columba, Spanish nun and martyrsource
- Gauzbert, count of Maine (approximate date)source
- Gauzbert, count of Maine, is killed during an ambush by citizens of Nantes, in revenge for the death of Lambert II.source
- Ono no Takamura, Japanese scholar (b. 802)source
- Ishaq ibn Rahwayh, Muslim imam (or 852)source