1830
ID: 781
July Revolution in France occurs during Pope Pius VIII's pontificate
ID: 781
1830
ID: 783
Charles Lyell publishes Principles of Geology - applies mathematical rates to establish deep time
ID: 783
1830
ID: 784
Evariste Galois develops group theory to determine which polynomial equations have formula solutions
ID: 784
1830
ID: 787
Last Russian military colonies dissolved by Nicholas I - final revolt, 200,000 controlled for 15 years
ID: 787
1830
ID: 5785
Temperance movement targets apple cider - hard cider seen as gateway to alcoholism, orchards begin being destroyed
ID: 5785
1830
ID: 779
March 25, 1830
Pope Pius VIII issues Litteris Altero on mixed marriages - entirely disapproved and avoided
ID: 779
1830
ID: 785
July 18, 1830
Our Lady appears to St. Catherine Laboure at Rue du Bac - speaks 2 hours about mission
ID: 785
1830
ID: 782
October 31, 1830
Mazzini arrested at Genoa, interned at Savona - conceives new movement to replace Carbonari
ID: 782
1830
ID: 786
November 27, 1830
Miraculous Medal vision - Those who wear it will receive great graces - 2 million medals by 1836
ID: 786
1830
ID: 780
November 30, 1830
Pope Pius VIII dies suddenly after only 20 months in office
ID: 780