Gülhane Parkı Sarnıcı
Located within Gülhane Park in the Fatih district, Gülhane Parkı Sarnıcı is a Byzantine-era water cistern. Believed to have been built between the 5th and 7th centuries, the cistern measures 18 x 12 meters and is supported by 12 marble columns. After being hidden for many years, it was restored and reopened in 2023 as "Gülhane Sanat," serving as a cultural and art center. It is 334 meters from Gülhane tram stop and within walking distance of Hagia Sophia (600 m), Topkapı Palace (296 m), and Basilica Cistern (662 m).