Benefactor Sultana B. 1745 - D. October 16th, 1805 is the mother of Padishah Selim III, and the wife of Sultan Mustafa III. She was from a family of Genoese origin and her real name was supposed to be Agnes. In some sources it is suggested that she was of French origin, and her real name was Janet. Mihrişah Sultan, who was named 'Mihrişah' after coming the Ottoman Palace, was sent to Old Palace after the death of her husband Mustafa III. When Selim III became the Padishah (1789-1807), she became the Sultana. Although she gained a reputation after Selim's birth, she never interfered in the affairs of state. Loved and respected by her son, Mihrişah took part in history with her appreciation of charities and devotion to God.
Mihrişah Sultana used to live at the Beach Palace located in Eyüp with her daughter in summer times in order to benefit from Hazret-i Halit's (flag-bearer of the Prophet Mohammed) spirituality (superior actions, action). She had a tomb, madrasah, library and poorhouse (school and social complex) built in 1795 in Eyüp, Valide Reservoir, on the Arabacı Mandrası Stream in Bahçeköy, the Mihrişah Sultana fountain in 1805 in Yeniköy, the mosque, fountain, primary school in the garden of barracks in Levent farm, and a fountain in front of the Küçüksü Chalet in Küçüksü (1806). She had the lodge used by mevlevi dervishes in Kasımpaşa repaired. She got the mosque in the Lağımcılar Barracks in Hasköy and Mihrişah Valide Sultan in Halıcıoğlu built, besides she establish charitable foundation in order to get all these works performed.Mihrişah Sultana died during the reign of her son, Selim III (1805), and she was buried to Mihrişah Valide Sultan Tomb in Eyüp. There is her epigraph dated 1796 on the marble wall of water catchments which was thought to supply water to her charities. The fountain, constructed in 1794, and the public fountain are near to Mihrişah Valide Sultan Tomb, close to the Bostan dock in Eyüp. It is a round facade, decorated in the rococo style fountain and public fountain. Important poets of that period such as Şeyh Galip, Aynî, Fazıl-ı Enderunî, Sururi, Sünbülzade Vehbi and İhya wrote more than one poem for both the fountain and public fountain, among them, Şeyh Galip's poem was selected to be put on the epigraph. The public fountain is a construction with five nets, broad overhang, and windows with columns. It has fountains at both sides of it, and this construction was the work of chief architect Arif Efendi.