Roman Sanguszko, Polish general (d. 1881)
Prince Roman Adam Stanisław Sanguszko (1800–1881) was a Polish aristocrat, patriot, political and social activist.

1800May, 6
Roman Sanguszko
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Events on 1800
- 14May
Washington, D.C.
The process of the U.S. Government moving the United States capital city from Philadelphia to Washington, D.C. begins. - 14Jun
Battle of Marengo
The French Army of First Consul Napoleon Bonaparte defeats the Austrians at the Battle of Marengo in Northern Italy and re-conquers Italy. - 30Aug
Slave rebellion
Gabriel Prosser postpones a planned slave rebellion in Richmond, Virginia, but is arrested before he can make it happen. - 7Oct
Robert Surcouf
French corsair Robert Surcouf, commander of the 18-gun ship La Confiance, captures the British 38-gun Kent inspiring the traditional French song Le Trente-et-un du mois d'août. - 17Nov
6th United States Congress
The United States Congress holds its first session in Washington, D.C.