Belgorod Kievsky
Bilogorodka, Ukraine
Bilhorod Kyivskyi or Belgorod was a city-castle in Kievan Rus', on the right bank of the Irpin River. Established in 991, it stood on the roadway connecting Kyiv with the cities of Zhytomyr and Halych, but was destroyed by the Tatars. The remains of the city are located near the present-day village of Bilohorodka in Kyiv Oblast, Ukraine.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).