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Poltava (Ukraine); Полтава (Ukraine) - LC Linked Data Service: Authorities and Vocabularies | Library of Congress

found: SSSR, admin.-territ. delenie, 1977:p. 319 (Poltava, first mentioned in chronicles of 1174)

found: Ukr. rad. ent︠s︡ykl.:v. 8, p. 490 (Poltava administrative center of Poltavsʹka oblastʹ; 1st named Ltava in 1174 [no publs. in LC data base]; was not called Poltava until 15th cent.; after 1569 under Polish rule until 1654 when it became part of Russian Empire; site of 1709 battle with Swedes; from 1802 was admin. center of Poltavsʹka hubernii︠a︡)

found: Britannica, online, August 30, 2022(Poltava; archaeological evidence dates the city from the 8th to the 9th century, although the first documentary reference is from 1174, when it was variously known as Oltava or Ltava) - https://www.britannica.com/place/Poltava-Ukraine