820
year
Year 820 (DCCCXX) was a leap year starting on Sunday of the Julian calendar.
Events
By place
Abbasid Caliphate
Abbasid caliph Al-Ma'mun appoints Isa ibn Yazid al-Juludi as Abbasid governor of Yemen, for a few months.
Caliph Al-Ma'mun appoints Hisn ibn al-Minhal as Abbasid governor of Yemen, for a few months.
Caliph Al-Ma'mun appoints Ibrahim al-Ifriqi as Abbasid governor of Yemen. He remains in office until 821.
Caliph al-Ma'mun appoints Abu Nasr ibn al-Sari as Abbasid governor of Egypt.
Byzantine Empire
December 25 – Emperor Leo V (the Armenian) is assassinated by conspirators in the Hagia Sophia, at Constantinople. Though unarmed, he fights back fiercely but dies of his wounds. He is succeeded by Michael II, the commander of the palace guard (excubitores). Leo's family (including his mother and his wife Theodosia) are exiled to monasteries in Princes' Islands.
Begin with the source’s own compact description: “820” is year. The dossier treats that line as a proposition to test through year, not as a finished interpretation.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Mar 23, 2026. The linked authority identifier is Q24872. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “820” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.