Important Historical Events of the year 1800, Year 1800 in History

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List of 1800 Major News Events in History, Most Important Historical Events in 1800

What happened in the year 1800?

Date	Event
March 21, 1800	With the church leadership driven out of Rome during an armed conflict, Pius VII is crowned Pope in Venice with a temporary papal tiara made of papier-mâché.
April 2, 1800	Ludwig van Beethoven leads the premiere of his First Symphony in Vienna.
April 6, 1800	The Treaty of Constantinople establishes the Septinsular Republic, the first autonomous Greek state since the Fall of the Byzantine Empire. (Under the Old Style calendar then still in use in the Ottoman Empire, the treaty was signed on 21 March.)
April 20, 1800	The Septinsular Republic is established.
April 24, 1800	The United States Library of Congress is established when President John Adams signs legislation to appropriate $5,000 to purchase "such books as may be necessary for the use of Congress".
May 14, 1800	The 6th United States Congress recesses, and the process of moving the Federal government of the United States from Philadelphia to Washington, D.C., begins the following day.
June 7, 1800	David Thompson reaches the mouth of the Saskatchewan River in Manitoba.
June 14, 1800	The French Army of First Consul Napoleon Bonaparte defeats the Austrians at the Battle of Marengo in Northern Italy and re-conquers Italy.
June 15, 1800	The Provisional Army of the United States is dissolved.
June 19, 1800	War of the Second Coalition Battle of Höchstädt results in a French victory over Austria.
August 1, 1800	The Acts of Union 1800 are passed which merge the Kingdom of Great Britain and the Kingdom of Ireland into the United Kingdom of Great Britain and Ireland.
August 30, 1800	Gabriel Prosser postpones a planned slave rebellion in Richmond, Virginia, but is arrested before he can make it happen.
September 4, 1800	The French garrison in Valletta surrenders to British troops who had been called at the invitation of the Maltese. The islands of Malta and Gozo become the Malta Protectorate.
September 11, 1800	The Maltese National Congress Battalions are disbanded by British Civil Commissioner Alexander Ball.
October 1, 1800	Via the Third Treaty of San Ildefonso, Spain cedes Louisiana to France, which would sell the land to the United States thirty months later.
October 7, 1800	French corsair Robert Surcouf, commander of the 18-gun ship La Confiance, captures the British 38-gun Kent.
October 17, 1800	War of the Second Coalition: Britain takes control of the Dutch colony of Curaçao.
November 1, 1800	John Adams becomes the first President of the United States to live in the Executive Mansion (later renamed the White House).
November 17, 1800	The United States Congress holds its first session in Washington, D.C.
December 3, 1800	War of the Second Coalition: Battle of Hohenlinden: French General Jean Victor Marie Moreau decisively defeats the Archduke John of Austria near Munich. Coupled with First Consul Napoleon Bonaparte's earlier victory at Marengo, this will force the Austrians to sign an armistice and end the war.
December 3, 1800	United States presidential election: The Electoral College casts votes for president and vice president that result in a tie between Thomas Jefferson and Aaron Burr.
December 24, 1800	The Plot of the rue Saint-Nicaise fails to kill Napoleon Bonaparte.