Editing 880 (section)

==== Byzantine Empire ====
* [[Battle of Cephalonia]]: A [[Byzantine Empire|Byzantine]] fleet, under Admiral [[Nasar]], is sent by Emperor [[Basil I]] to the [[Ionian Islands]]. Nasar defeats the [[Aghlabids]] in a night battle near [[Cephalonia]] (modern [[Greece]]).
* [[May 1]] &ndash; The [[Nea Ekklesia]] is inaugurated in [[Constantinople]], by Patriarch [[Photios I of Constantinople|Photius I]], setting the model for all later [[cross-in-square]] Orthodox churches.<ref name=Mango194>Mango (1986), p. 194.</ref>{{Full citation needed|date=December 2024}}<ref name="Ousterhout34">Ousterhout (2007), p. 34.</ref>{{Full citation needed|date=December 2024}}