Editing 1805 (section)

=== April–June ===
* [[April 7]] – [[Ludwig van Beethoven|Beethoven]]'s [[Symphony No. 3 (Beethoven)|Symphony No. 3]], ''Eroica'', has its public premiere at the [[Theater an der Wien]] in Vienna under his baton.
* [[April 27]] – [[Battle of Derne]]: [[United States Marines]] and [[Berbers]] attack the [[Tripoli, Libya|Tripoli]]tan city of [[Derna, Libya|Derna]] (the ''Shores of Tripoli'').
* [[April 29]] – [[Rutger Jan Schimmelpenninck]] is appointed as [[Grand Pensionary]] of the [[Batavian Republic]] by [[Napoleon]].
* [[May 26]] – [[Napoleon]] is crowned [[King of Italy]].
* [[May 31]]–[[June 2]] – [[Napoleonic Wars]]: [[Battle of Diamond Rock]] – A Franco-Spanish fleet captures the strategic island of [[Diamond Rock]] off [[Martinique]] in the [[West Indies]], from the British.
* [[June 1]] – Tuscan-born composer [[Luigi Boccherini]] is buried in the [[Basílica pontificia de San Miguel]] in Madrid after being found dead on [[May 28]].
* [[June 4]]
** The [[First Barbary War]] ends between Tripoli and the United States of America.
** The first [[Trooping the Colour]] ceremony is held at the [[Horse Guards Parade]] in London.
** Detroit burns to the ground; most of the city is destroyed.
* [[June 13]] – [[Lewis and Clark Expedition]] in the United States: Scouting ahead of the expedition, [[Meriwether Lewis]] and four companions sight the [[Great Falls of the Missouri River]], confirming they are heading in the right direction.