the Mitkirey River flows from the North to the South. The Sosnovochka River (means Small Piny River) flows through the selo from the West to the East. Both rivers are tributaries of the Khopyor. HistoryСайт истории села «Летопись села Сосновка» There are a Bronze Age matted burial mound height in to the West from the selo; and a Bronze Age ploughed up burial ground of three mounds in South-West from the selo. According to local legend, the name of the selo came from a large lake surrounded by pine trees. Definitely one can only say this is area of pinewoods. 18th century (Russian Empire) Three settlements were founded on the place of present-day selo in the early to the middle of the 18th century, before 1721: selo Rozhdestvenskoye (), or Sosnovka (, "Piny Village"), founded by landlord colonel (polkovnik) prince (knyaz) Fyodor Grigor'yevich Tyufyakin (); 84 "census souls" were in 1747 sel`tso Rozhdestvenskoye (), or Mitkirey (), founded by landlord prime-major of the 1st Moscow Regiment Pyotr Grigog'evich Plemyannikov (); 88 "census souls" were in 1747 sel`tso Rozhdestvenskoye, or Sosnovka, or Mitkirey, founded by Cathedral of the Annunciation, Moscow; 288 "census souls" were in 1747. Peasants came from Nizhny Lomov, Penza, Shatsk, Moscow, Saransk, Yaroslavl, Simbirsk districts (uyezds). 460 "census souls" were in 1747 in all. In 1747 these three settlements were in Zaval'niy stan of Penza District (Uyezd). In 1780 these settlements were included in Serdobsk District (Uyezd) of Saratov Governorate (Guberniya). It was a rich trade place. According to the map of General Land Surveying of 1790 Two settlements were situated on this place in the late of the 18th century: selo Rozhdestvenskoye, or Vlasovka; it was a mistake of the map-maker, correctly is Sosnovka selo Troitskoye (, "Trinity Village"), or Sosnovka In 1795 selo Troitskoye, or Sosnovka consisted of three parts: estates of economic peasants 181 farmsteads, 758 "census souls" estate of lieutenant (poruchik) Ivan Andreyevich and Guards ensign (praporshchik) Nikonor Andreyevich, princes Divletkildeyevy, 42 farmsteads, 152 "census souls" estate prince (knyaz) of Sergey Fyodorovich Golitzyn, 17 farmsteads, 89 "census souls". From 19th century to 1917 (Russian Empire) In 1811 one part of the selo was inhabited by state peasants (677 "census souls"), another part by praedial serf of general-major Sergey Fyodorovich Golitzyn (89 "census souls" on 586 desyatinas and of princes Ivan Andreyevich и Nikonor Andreyevich Divletkildeyevy (152 "census souls" on 1219 desyatinas). Prior to the