Interesting facts Teams were cleaning the basement of one of Istanbul’s most famous monuments when they revealed tunnels, cisterns, and seven water channels connected to ancient Constantinople. Geovane Souza 10/06/2026 at 20:26
Science and Technology Network Of 7 Underground Tunnels Approximately 1,600 Years Old And Funeral Hypogeum Identified Beneath The Hagia Sophia During Restoration That Removed 1,170 Tons Of Sediment In Istanbul Romário Pereira de Carvalho 02/03/2026 at 11:41
