Rumeli Hisarı (castle) built

1451 CE.

Shown on the map at 41.085°, 29.056°.

Rumelihisarı (also known as Rumelian Fortress and Roumeli Hissar Fortress) or Boğazkesen Fortress (literally 'strait-cutter fortress') is a medieval Ottoman fortress located in Istanbul, Turkey, on a series of hills on the European banks of the Bosphorus. The fortress also lends its name to the immediate neighborhood around it in the city's Sarıyer district. Conceived and built between 1451 and 1452 CE on the orders of Sultan Mehmed II, the complex was commissioned in preparation for a planned Ottoman siege on the then-Byzantine city of Constantinople, with the goal of cutting off maritime military and logistical relief that could potentially come to the Byzantines' aid by way of the Bosphorus Strait, hence the fortress's alternative name, "Boğazkesen", i.e. "Strait-cutter" Castle.

Text from the Wikipedia article Rumelihisarı, licensed CC BY-SA 4.0.

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