Editing 1830 (section)

=== October–December ===
[[File:Gustave Wappers - Episode of the September Days 1830, on the Grand Place of Brussels - Google Art Project.jpg|thumb|250px|[[October 4]]: French-speaking and Flemish-speaking residents secede from the southern Netherlands to create [[Belgium]].]]  
* [[October 4]] – [[Belgian Revolution]]: The Provisional Government in Brussels declares the creation of the independent state of [[Belgium]].
* [[October 20]] – [[Thomas Cochrane, 10th Earl of Dundonald|Thomas Cochrane]] is granted a patent for the first [[airlock]].
* [[October]] – The [[Restoration and Regeneration in Switzerland#End of the Restoration|Regeneration in Switzerland]] begins; more liberal constitutions are adopted in most [[Cantons of Switzerland|cantons]].
* [[November 2]] – [[Jacques Laffitte]] succeeds the Duc de Broglie as [[Prime Minister of France]].
* [[November 8]] – [[Ferdinand II of the Two Sicilies|Ferdinand II]] becomes King of the [[Two Sicilies]].
* [[November 22]]
** The Whig [[Charles Grey, 2nd Earl Grey]] succeeds [[Arthur Wellesley, 1st Duke of Wellington]], as [[Prime Minister of the United Kingdom]].
** On what is now called "the [[Ustertag]]", men of the [[Canton of Zürich]]  in Switzerland gather to demand a new constitution.
* [[November 29]] – The Polish [[November Uprising]] begins in Warsaw against Russian rule.
* [[December 5]] – [[Hector Berlioz]]'s most famous work, ''[[Symphonie fantastique]]'', has its world premiere in Paris.
* [[December 20]] – The independence of [[Belgium]] is recognized by the [[International relations of the Great Powers (1814–1919)|Great Power]]s.