Istanbul: Underground mosque – Yeraltı Mosque
Ref: atlasislamica.com
See also tripadvisor.com, atlasobscura.com
Info
The Yeraltı Mosque is surprising and unconventional mosque hidden in the subsoil of Istanbul. It was originally the basement cellar of a Byzantine fortress. After the conquest of Constantinople in 1453, this cellar was used as a storage for ammunition and as a water cistern. The Ottoman vizier, Köse Bahir Mustafa Pasha, converted it into a mosque in 1753, and, at the request of a Naqshbandi dervish added memorial cenotaphs for three holy men. The 1754 Istanbul earthquake destroyed the structure, but it was rebuilt under the Ottoman Sultan Mahmud I in 1756. It contains the following memorials tombs:
Source: wiki









