Editing 815 (section)

== Events ==
<onlyinclude>

=== By place ===
==== Byzantine Empire ====
* [[Byzantine–Bulgarian Treaty of 815|Byzantine–Bulgarian Treaty]]: Emperor [[Leo V the Armenian]] signs a 30-year peace agreement in [[Constantinople]] with [[Omurtag]], ruler (''[[Khan (title)|khan]]'') of the [[First Bulgarian Empire|Bulgarian Empire]]. The [[Rhodope Mountains]] become the Byzantine border again, and Leo regains its lost [[Black Sea]] cities, after the [[Bulgars]] have them demolished.<ref>{{The Early Medieval Balkans|page=106}}</ref>

==== Central America ====
*[[April 2]] &ndash; Sihyaj K'in Ich’aak II becomes the new [[Maya rulers|ruler of the Mayan city state]] of [[Machaquila]] in [[Guatemala]] after the death of Ochk'in Kaloomte' Aj Ho' Baak, and reigns until early [[824]].

==== Europe ====
* [[Hrafna-Flóki Vilgerðarson]] sets out from the [[Faroe Islands]] and discovers [[Iceland]] (documented later in the ''[[Landnámabók]]'') (approximate date).

==== Britain ====
* King [[Egbert of Wessex]] ravages the territories of the remaining British kingdom [[Dumnonia]], known as the West [[Wales|Welsh]] ([[Cornwall]]).<ref name=Swanton_58>Swanton, ''Anglo-Saxon Chronicle'', pp. 58–59.</ref>

==== Asia ====
* Emperor [[Emperor Saga|Saga]] of [[Japan]] is the first [[Sovereignty|sovereign]] to drink [[tea]] (according to [[Japanese mythology|legend]]), imported from [[China]] by [[monk]]s. The [[upper class]]es adopt this [[Drink|beverage]] for [[Medicine|medicinal]] use.
* [[July 13]] &ndash; [[Wu Yuanheng]], Chinese [[Chancellor of the Tang dynasty|chancellor of the Tang Dynasty]], is murdered by [[Assassination|assassin]]s of warlord [[Wu Yuanji]], in [[Chang'an#South Central Chang'an|Chang'an]].

=== By topic ===
==== Religion ====
* [[Council of Constantinople (815)|Synod of Constantinople]]: A council led by patriarch [[Theodotus I of Constantinople|Theodotus I]], in the [[Hagia Sophia]], reinstitutes [[Byzantine Iconoclasm|iconoclasm]].<ref>{{Oxford Dictionary of Byzantium|pages= 513–514}}</ref>
</onlyinclude>