Massive underground city discovered in Turkey may have housed 20,000 people or more
In 2013, workers in Turkey looking to demolish low-income housing near a Byzantine-era hilltop castle stumbled upon something extraordinary: an expansive underground city that may have housed 20,000 people or more.
In 2014, those documents led researchers to a multi-level underground village of living areas, wineries, chapels, and bezirhane-linseed presses for generating lamp oil. The research team was able to find numerous small artifacts, including stone crosses and ceramics. The artifacts reveal that the settlement was used from the Byzantine era all the way up to the Ottoman conquest, researchers said.
The team said that the newly discovered site appears to be similar to a nearby underground settlement called Derinkuyu, with airshafts and water channels designed to sustain life.
http://www.rawstory.com/rs/2015/03/massive-underground-city-discovered-in-turkey-may-have-housed-20000-people-or-more/