Editing 1857 (section)

=== April&ndash;June ===
* [[April 4]] &ndash; The [[Anglo-Persian War]] ends.
* [[April 8]] &ndash; [[Mangal Pandey]] is hanged for [[mutiny]] against the [[British East India Company]] army; the execution is a precursor event to the [[Indian Rebellion of 1857]].
* [[April 14]] &ndash; [[Princess Beatrice of the United Kingdom|Princess Beatrice]], the fifth daughter and the youngest child of [[Queen Victoria]] and [[Albert, Prince Consort|Prince Albert]], is born.
* [[April 18]] &ndash; ''[[The Spirits' Book]]'' (''Le Livre des Esprits''), one of the ''Five Fundamental Works of [[Kardecist spiritism|Spiritism]]'', is published by French educator [[Allan Kardec]].
* [[April 27]] &ndash; First horse race run at [[Longchamp Racecourse]] in Paris.
* [[May 5]]–[[October 17]] &ndash; [[Art Treasures Exhibition, Manchester 1857|The Art Treasures of Great Britain]] exhibition is held in [[Manchester]], one of the largest such displays of all time.<ref>{{cite book|url=https://books.google.com/books?id=odcHAAAAQAAJ|title=Exhibition of art treasures of the United Kingdom, held at Manchester in 1857: report of the Executive Committee|year=1859|publisher=George Simms}}</ref>
* [[May 10]] &ndash; [[Indian Rebellion of 1857]]: The 3rd Light Cavalry of the [[British East India Company]]'s army rebels against its British officers, thus beginning the rebellion.
* [[May 11]] &ndash; [[Indian Rebellion of 1857]]: Indian combatants capture [[Delhi]] from the British East India Company.
* [[May 15]] &ndash; [[Spain|Spanish]] [[Financial|financial group]], [[Banco Santander]] founded in [[Cantabria]], Spain.
* [[May 28]] &ndash; Banco de Bilbao, as predecessor of [[Banco Bilbao Vizcaya Argentaria|BBVA]] is founded in Spain.
* [[June 1]] &ndash; [[Second Anglo-Chinese War]]: [[Battle of Fatshan Creek]] &ndash; The British Royal Navy defeats the Cantonese fleet of Qing dynasty China. 
* [[June 6]] &ndash; [[Sophia of Nassau]] marries the future King [[Oscar II of Sweden|Oscar II]] of [[Union between Sweden and Norway|Sweden–Norway]].
* [[June 12]] &ndash; U.S. mercenary [[William Walker (filibuster)|William Walker]] is overthrown as ruler of [[Nicaragua]] by Honduran general [[Florencio Xatruch]].
* [[June 20]] &ndash; The [[Victoria and Albert Museum]] in London is officially opened by [[Queen Victoria]].
* [[June 26]] &ndash; At a ceremony in London, [[Queen Victoria]] awards the first 66 [[Victoria Cross]]es to [[British Empire|British]] troops, for actions during the [[Crimean War]].<ref name="Pocket On This Day"/>