Kharkiv, also known as Kharkov, is the second-largest city in Ukraine. Located in the northeast of the country, it is the largest city of the historic region of Sloboda Ukraine. Kharkiv is the administrative centre of Kharkiv Oblast and Kharkiv Raion. Prior to the Russian invasion of Ukraine in early 2022 it had an estimated population of 1,421,125. . Founded in 1654 as a Cossack fortress, by late 19th century Kharkiv had developed within the Russian Empire as a major commercial and industrial centre.
https://en.wikipedia.org/wiki/Kharkiv