Rumeli Hisar Castle is located on the European side of Istanbul, overlooking the Bosphorus Strait. It was built by Sultan Mehmed the Conqueror in only 4 months, and was the starting point for his conquest of Constantinople. Its walls are 82 meters high. It is a splendor in the beauty of the terrain and was a miracle in construction timing and engineering. Truth be told, Mehmed the Conqueror was all a miracle. The castle was built in preparation for the conquest of Constantinople and to tighten the siege around it. The Rumeli Siege Castle is one of the most important landmarks of the historical city of Istanbul. The castle, which overlooks the Bosphorus Strait, is distinguished by its high walls and towers.
It is located on the narrow border between the Anatolian coast and the Rumeli coast, and the distance between them is estimated at about 700 meters. It is one of the works of the architect Muslih al-Din. In fact, this castle consisted of three corners and three towers, two of which controlled the sea, and one of them controlled the land. The polygonal tower located next to the sea was built by the Grand Vizier (Khalil Pasha Candarli), the tower overlooking the village of Hisar was built by (Sarojeh Pasha), and the tower overlooking (Hay Babak) was built by (Zaganos Mehmed Pasha), and it is said that these people used to work with their hands in building until they were A role model for workers.
Sultan Mehmed the Conqueror, at the head of a force of fifty thousand people, arrived at the site where “Rumeli Siege” was located on Sunday, the 5th of Rabi’ al-Awwal 856 AH, corresponding to March 26, 1452 AD, in order to cut off the Black Sea canal to “Byzantium.” He remained at this site until the end of August, where he directly supervised the construction work, in which he employed between 3 and 5 thousand workers, and ten thousand men as assistants, and succeeded in completing the work at the end of August.
It is clear that this enormous work was completed within three and a half months, and when the castle was completed, and the rulers sat in it, Sultan Mehmed the Conqueror returned to Adrianople on Monday, the 12th of Shaaban, corresponding to the 28th of August.