Refuge Over Time
Serving as a place of refuge continued well into the 20th Century. Christians burrowed beneath Derinkuyu to save themselves from the Ottoman wave of persecution as late as 1909.
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One At A Time, Please
The massive lair was not simply a hiding place but rather it was a safe haven as well. The complex underground had a safety system that made it almost impenetrable. Each entrance was only big enough to fit a single person through at a time.