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. It had a population, before the Russian invasion, of 1,421,125 (2022 estimate). Kharkiv was founded in 1654 as a fortress of the Tsardom; following the transformation into the Russian Empire Kharkiv grew to become a major centre of industry, trade, and Ukrainian culture in Sloboda Ukraine.
https://en.wikipedia.org/wiki/Kharkiv