There no documents indicating that Prophet Joshua died in Istanbul . Nevertheless, there is a great interest in this location. According to legend, Prophet Joshua‘s grave was discovered by Sheikh Yahya Efendi, who died in Beşiktaş. According to him: when Yavuz Sultan Selim I was a governor of Trabzon, his son, later to be Suleyman I, was born and a wet nurse hired. Seikh Yayhya Efendi was the son of this wet nurse. After about forty years, when suleyman became sultan, Yahya Efendi was a great scholar and an expert in Sufism. One day Yahya Efendi came to Istanbul to visit the sultan. Sultan Suleyman constructed two lodges for him, a winter house in Beşiktaş and a summer house in ANadolu Kavağı, Yahya Efendi had a dream when he was at the summerhouse . After this, Yahya Efendi and friends climbed the hill and started their search. Eventually they asked a shapherd if he had seen anything extraordinary on the hills. The shepherd took Yahya Efendi to the location where the grave is and said, “Sir, do you see this place? Even though is extremely green, the sheep do not step on it, they do not eat the grass from here, and they gor around it.” Yahya Efendi then informed the sultan of this situation and constructed a tomb here.
Later, in 1755 Grand Vizier Mehmed Said Pasha constructed the mosque that is found here. Another characteristic of Joshua Hill is that it is the highest and the closet hill to the sea in Istanbul (200 meters). From the hill the view of the Bosphorus is magnificent. Here there are religious bookshops and places that sell snacks and light meals.