Rumelihisarı (Boğazkesen Castle) is a medieval fortress located in the city of Istanbul, Turkey. It is situated on a series of hills on the banks of the Bosphorus on the European side. The fortress was built in 1451-52 on the orders of Ottoman Sultan Mehmed II. It was built strategically for a planned siege of 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. The fortress in later centuries served as a customs checkpoint and a prison. The fortress now serves as a museum and a events venue.
The fortress is situated on the European side of the Bosphorus. The 22, 25E, 40, 40T and 42T buses stop close by.
Opening Times and Admission
The fortress is open to visitors six days of the week. Thursday to Tuesday 9am-7pm with Wednesdays being a weekly day of closure. Admission to the fortress costs 10TL.