Peter Lacy

*Graf*
Peter von Lacy
Graf Peter von Lacy
	Peter Lacy by Johann Jacob Haid
Governor of Riga
	In office; 1729–1740
Commander of Saint Petersburg and Veliky Novgorod
	In office; 1725–1728
Personal details
Born	Pierce Edmond de Lacy; 30 October 1678; Killeedy, County Limerick, Ireland
Died	30 April 1751 (aged 72); Governorate of Livonia, Russian Empire
Resting place	Skaistkalne
Spouse	Maret Philippine "Martha" von Funcken
Children	Count Franz Moritz von Lacy
Occupation	Soldier
Awards	Order of Saint Andrew ; Order of Saint Alexander Nevsky ; Order of the White Eagle (Poland)
Military service
Years of service	1691 to 1751
Rank	General-feldmarshal
Battles/wars	Expand list: Williamite War in Ireland; Nine Years' War; Great Turkish War; Great Northern War Battle of Narva; Battle of Hummelshof; Battle of Grodno; Battle of Poltava; Capitulation of Estonia and Livonia; Landings on the coast of Sweden; ; Russo-Turkish War (1710–1713) Pruth River Campaign; ; War of the Polish Succession Siege of Gdańsk Battle of Wyszecino; ; Rhine campaign (1735); ; Russo-Turkish War (1735–1739) Battle of Azov; Crimea; ; Russo-Swedish War (1741–1743) Battle of Villmanstrand; Capitulation at Helsingfors; ;

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Peter Graf von Lacy (26 September 1678 – 30 April 1751) was an Irish-born soldier who later served in the Imperial Russian Army.

Considered one of the most successful Russian commanders before Rumyantsev and Suvorov, in a military career that spanned half a century he claimed to have participated in 31 campaigns, 18 battles, and 18 sieges. He died on his private estate in Riga, where he served as governor for many years. His remains were buried in the crypt of the Catholic church in Skaistkalne, in southern Latvia.

One of his sons was Count Franz Moritz von Lacy, who went on to serve in the Imperial Habsburg Army, while his nephew George Browne (1698–1792) was also a general in the Russian army.