According to the museum this cross belong to count Georgi Arsenyevich Emmanuel (13 April 1775–26 January 1837).
He was awarded with 3rd class on August 17, 1813.
Official citation.
"In tribute to the excellent bravery and courage shown in the battle against the French troops on August 8 at Leuvenberg".
"В воздаяние отличной храбрости и мужества, оказанных в сражении против французских войск 8 августа при Левенберге".
The problem with this attribution is that the cross doesn`t look like a typical piece issued in 1813 for the Napoleonic Wars (see for example
https://asiamedals.info/threads/3rd...rshal-leopold-hermann-ludwig-von-boyen.23452/) .
It looks like a typical cross from 1840s-1870s time period.
George Arsenyevich Manuilović (hence Emmanuel) was born in Vršac, a Serbian town in the Banat Military Frontier of the Habsburg Monarchy where from early age he participated in actions against the Ottoman Empire in the Siege of Belgrade (1789) in the ranks of the Serbian Frei-Corps (volunteers). In 1791 he joined the Austrian army to fight the Porte. At Landau in 1792, he was seriously wounded after receiving a bayonet wound to the stomach, and a cannonball splinter to the right hand. The same year, in another battle he was shot with canister in the right leg. For his actions under combat, he was awarded a gold medal with inscription "Der Tapferkeit" (for bravery) and, notwithstanding his humble origins, was accepted in the Hungarian Guard with rank of second lieutenant in 1794. But Emmanuel soon found the Austrians reluctant to commit resources to the Serbian cause (war of independence). Dissatisfied with his prospects he resigned in late 1796 and sought military employment elsewhere. He arrived in Moscow in April 1797 and applied to Emperor Paul I of Russia, who immediately accepted his services. The same day, he enlisted in the Life Guard Hussar Regiment with a rank of lieutenant. The next year, he became staff rotmistrz (or rittmeister) and in 1799, was promoted to rotmistrz, commander of between 100 and 180 hussars, having lieutenant Hussar executing his order. He was highly valued by Paul I who, in October 1800, promoted Emmanuel to colonel. With the accession of Alexander I of Russia, Emmanuel's rapid promotion slowed down. In 1802, he was transferred to the Kiev Dragoon regiment and then participated in the 1806-1807 Campaign against Napoleon. At the Battle of Pultusk, he commanded two squadrons and was again seriously wounded, but remained in the ranks. For his courage, Emmanuel was awarded a Golden Weapon "For Bravery". After his wounds healed, he served in General Ivan Essen's 1st Corps. In June 1807, he fought at Dobre Miasto (Guttstadt), where he personally led his squadron in a charge and captured over 100 French. For his actions, he was awarded the Order of Saint Vladimir (4th Class). He then distinguished himself at the Battle of Heilsberg and received the Order of Saint Anna (2nd Class). At the Battle of Friedland on 14 June 1807, he served with Kiev Dragoons, covered the retreat of the main forces, and destroyed the bridges over the Neman River. On 24 May 1808, he was appointed commander of the Kiev Dragoon Regiment and on 23 December 1808, became chef of the Kurland Dragoon Regiment. Two months later, on 2 February, he became chef of Kiev Dragoon Regiment.
During the 1809 Campaign against Austria, his regiment was assigned to the corps of Sergey Fedorovich Golitsyn (1749-1810) to fight the Austrians, but Emmanuel appealed to Alexander for permission to avoid the service because he once had served in Austria. His petition was satisfied and he did not participate in the actions.
In 1812, Emmanuel served in the 2nd Western Army and fought at the Battle of Mir (1812) on the 9th of July, for which he received the Order of St. Vladimir (3rd Class). He took part in actions at Novoselsk, Saltanovka, Smolensk and the retreat from the Battle of Borodino to the Shevardino Redoubt. He led several charges against the French at Shevardino but was wounded in the chest. For his courage, he received the Order of St. George (4th Class). Emmanuel spent next weeks recuperating and joined the army in late September at the Battle of Tarutino. In October he was assigned to the advance guard and fought at Battle of Vyazma. For his actions, he was promoted to major general on 7 January 1813. During the campaign in Germany, Emmanuel took part in sieges of Modlin and Glogow, and then commanded a detachment around Zwenkau. He was one of the first to cross the Elbe River and participated in several minor actions prior to the Battle of Bautzen, where he distinguished himself against Jacques MacDonald, Marshal of France. During the armistice, he was observing the demarcation lines on the Bohemian borders. For his actions before and after Bautzen, he was awarded the Order of St. Anna (1st Class) and Prussian Order of Red Eagle (2nd Class). As the hostilities resumed, Emmanuel commanded the cavalry of the advance guard of Louis Alexandre Andrault de Langeron's Corps. On the 19th of August he fought the French near Zibeneichen on the Bobr River and then had several minor actions until the Battle of Katzbach, where, according to the official rosters, he captured seven guns and 1,131 men. He then engaged the French at Levenberg on the 29th of August and had minor actions at Stolpen, Rotmeritz, Bischofswerda, Elster, Duben, Rodefeld, and Badefeld. For his service in these actions, he was awarded the Order of St. George (3rd Class). Emmanuel then took part at the Battle of Leipzig on 16–18 October and distinguished himself by capturing two generals, including Jacques Lauriston, 17 officers and 400 soldiers. However, Emmanuel was not awarded for this action because of disagreements on tactics with the famed Gebhard Leberecht von Blücher. He was soon transferred to Lieutenant General Guillaume Emmanuel Guignard, vicomte de Saint-Priest's 8th Corps and fought at the Battle of Reims, where he covered the retreat of the Russian troops. He took part in the Battle of Paris (1814) and was promoted to lieutenant general on 8 May 1814. He also received the Prussian Order of the Red Eagle (1st Class) and the Swedish Order of the Sword (2nd Class). In 1815, Emmanuel was given command of the 4th Dragoon Division and remained at this position for the next ten years. In July 1826, he was appointed to command the Russian forces in the Caucasus and succeeded in subjugating the local tribes. For his actions, he received the Imperial Order of Alexander Nevsky. During the Russo-Turkish War (1828-1829), he defeated and annexed several major regions in the North Caucasus, including Karachaevo (Karachay-Cherkessia), and suppressed a pro-Turkish uprising in the Kuban Valley. For his actions, he was promoted to general of cavalry in June 1828 and two years later was awarded a lifetime pension and estate. Emmanuel retired in 1831 and lived at Elizavetgrad (now Kirovohrad) for the next six year. He died there on 26 January 1837.