Mangup (fortress) built
300 CE.
Shown on the map at 44.593°, 33.801°.
Mangup (Russian: Мангуп; Ukrainian: Мангуп, romanized: Manhup; Crimean Tatar: Mangup) also known as Mangup Kale (kale means "fortress" in Turkish) is a historic fortress in Crimea, located on a plateau about 13 kilometres east of Sevastopol (ancient Chersonesus).
Text from the Wikipedia article Mangup, licensed CC BY-SA 4.0.