Louis Adolf Peter, 1st Prince of Sayn-Wittgenstein-Ludwigsburg-Berleburg (17 January [O.S. 6 January] 1769 – 11 June 1843), better known as Peter Wittgenstein in English, was a prince of the German dynasty of Sayn-Wittgenstein and field marshal in the Imperial Russian Army during the Napoleonic Wars. He was nicknamed the Saviour of Saint-Petersburg.
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Early life
Born Ludwig Adolf Peter Graf zu Sayn-Wittgenstein-Ludwigsburg-Berleburg, he was descended from a family of ruling German Counts whose seat was in Berleburg (present day North Rhine-Westphalia, Germany). His parents were Count Christian Louis Casimir of Sayn-Wittgenstein-Ludwigsburg and his first wife, Countess Amalie Ludowika Finck von Finckenstein (1740–1771).
Military career
Enrolled as a sergeant in the Semyonovsky Regiment of the Imperial Russian Army at the age of 12 in 1781, Wittgenstein began actual military service as a Wachtmeister in the Life Guard Horse Regiment in 1789. In 1793 he gained promotion to Major in the Ukrainian Light Cavalry Regiment. He fought with the unit in the Kościuszko Uprising of 1794. Promoted to the rank of colonel in 1798, and to major general in 1799, in 1800 he took command of the Mariupolski Hussars Regiment.
In 1805 he fought at Austerlitz, in 1806 against the Turks, and in 1807 against Napoleon at Friedland and against the Swedes in Finland.



