Fortress of St. Elizabeth
The Fortress of St. Elizabeth (Ukrainian: Фортеця Святої Єлисавети, also known locally as "earthworks") is a former earthen fortress in the form of a six-pointed star in the city of Kropyvnytskyi in central Ukraine, which became the main symbol of the city.
Source: Wikipedia — Fortress of St. Elizabeth (CC BY-SA 4.0)