It's located in Cagaloglu neighborhood near the Underground Cistern. The hammam was built by an unknown architect in 1741 by the order of Sultan Mahmut I to provide revenue for the library of Sultan Mahmut and the Aya Sofya (Hagia Sophia) Mosque at that time.
The hammam has separate sections for both men and women. It combines different Ottoman architectural styles and was the last of the great hammams to be built in the city before their construction was forbidden by Sultan Mustafa III in 1768, because of the increasing needs for water and wood in Istanbul.
The door of the women's section is on a side street called Hamam street, while the men's entrance is from the main road of Yerebatan street. After entering, in the middle is a pool with a waterjet and dressing rooms around. The domes are supported by arches and columns. After the cold area (sogukluk), you enter in the hot area (sicaklik). There is a marble platform (gobektasi) in the center, surrounded by bathing cubicles (halvets) in all four corners.
It's open everyday between 08:00-22:00 for the men and between 08:00-20:00 for the women.