Yeraltı Camii, Underground mosque in Karaköy, Turkey
The mosque features a prayer hall located beneath street level, accessed through two entrances that lead visitors down a tunnel into the building.
Originally serving as a Byzantine fortress basement before 1453, this structure transformed into an ammunition storage facility following the Ottoman conquest of Constantinople.
Two chambers within the mosque contain wooden cenotaphs dedicated to Islamic figures, including Amr ibn al-As and Wahb ibn Husayra, enclosed by iron grilles.
The interior space maintains low ceilings with green fluorescent lights illuminating the prayer area and ancient tombs throughout the underground structure.
The mosque received its current form in 1753 when Ottoman vizier Köse Bahir Mustafa Pasha converted the former cellar into a religious space.
Location: Beyoğlu
Location: Istanbul Province
Architectural style: Ottoman architecture
GPS coordinates: 41.02253,28.97648
Latest update: March 8, 2025 02:12
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