Editing 1456 (section)

== Events ==
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=== January&ndash;December ===
* [[May 18]] &ndash; Second [[Battle of Oronichea (1456)]]: [[Ottoman Empire|Ottoman]] Forces of 15,000 are sent to capture [[League of Lezhë|Albania]], but are met and swiftly defeated by [[Skanderbeg]]'s smaller forces.
* [[June 9]]  &ndash; [[Halley's Comet]] makes an appearance, as noted by the humanist scholar [[Bartolomeo Platina|Platina]].
* [[July 7]] &ndash; A [[retrial of Joan of Arc]] acquits her of heresy, 25 years after her execution.
* [[July 22]] &ndash; [[Siege of Belgrade (1456)|Battle of Nándorfehérvár (Belgrade)]]: The Hungarians under [[John Hunyadi]] rout the Turkish army of Sultan [[Mehmed II]]. The [[noon bell]] ordered by [[Pope Callixtus III]] commemorates the victory throughout the Christian world (and hence is still rung).
* [[August 20]] &ndash; [[Vladislav II of Wallachia|Vladislav II]], reigning Prince of [[Wallachia]], is killed in hand-to-hand combat by [[Vlad the Impaler]], who succeeds him.
* [[October 17]] &ndash; The [[University of Greifswald]] is established, making it the second oldest university in [[Northern Europe]]. Due to border changes, from 1648 to 1815 it is the oldest in [[Sweden]], and from 1815 to 1945 the oldest in [[Prussia]].
* [[December 5]] &ndash; [[1456 Central Italy earthquakes|Two earthquakes]] in central Italy kill 12,000–70,000 people.<ref name="Nunziata">{{cite journal |author1=C. Nunziata |author2=M. R. Costanzo |title=Ground Shaking Scenario at the Historical Center of Napoli (Southern Italy) for the 1456 and 1688 Earthquakes |journal=Pure and Applied Geophysics |date=2020 |volume=177 |issue=7 |pages=3175–3190 |doi=10.1007/s00024-020-02426-y |url=https://link.springer.com/article/10.1007/s00024-020-02426-y |publisher=[[Springer Science+Business Media]]|bibcode=2020PApGe.177.3175N |s2cid=210975336 }}</ref>

=== Date unknown ===
* [[Lazar Branković]] becomes despot of [[Serbian Despotate|Serbia]].
* [[Alvise Cadamosto]] discovers some of the [[Cape Verde]] Islands.
* [[Diogo Gomes]] reaches the [[Geba River]] in Guinea Bissau, and explores the [[Gambia River]].
* Emperor [[Zara Yaqob]] of [[Ethiopian Empire|Ethiopia]] founds the city of [[Debre Berhan]].
* [[Grand Duchy of Moscow|Muscovy]] and the [[Novgorod Republic]] conclude the [[Treaty of Yazhelbitsy]].
* [[Petru Aron]] becomes the first ruler of [[Moldavia]] to pay tribute to the Ottomans.
* The fifth [[Mersenne prime]], 8191, is discovered.<ref>{{Cite web |title=List of known Mersenne prime numbers - PrimeNet |url=https://www.mersenne.org/primes/ |access-date=2022-12-14 |website=www.mersenne.org}}</ref></onlyinclude>