Basilica Cistern a Historical Landmark | Istanbul | Türkiye

The Basilica Cistern, or Cisterna Basilica is a Subterranean Cistern" or "Subterranean Palace" is the largest of several hundred ancient cisterns that lie beneath the city of Istanbul, Turkey. This was basically used to filter and supply water to the palaces and mosques.
The cistern, located 150 metres (490 ft) southwest of the Hagia Sophia on the historical peninsula of Sarayburnu, was built in the 6th century during the reign of Byzantine Emperor Justinian I.
Today it is kept with little water, for public access inside the space.

[@selinayasmin6727]

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[@bongoconnection]

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