8 Ruined Cities That Remain a Mystery to This Day
8 Ruined Cities That Remain a Mystery to This Day. Derinkuyu, Turkey Derinkuyu is an enormous, ancient underground city that dates back to the early Byzantine Empire. It's unknown when the city was begun — some sources say as early at the 7th century BCE — but it wouldn't have reached its greatest size until the period between 500-1000 CE, when it was five stories deep with room for 20,000 people, plus livestock, kitchens, a church, and a wine-making facility....
The Library of Celsus in Ephesus, Izmir Province,...
The Library of Celsus in Ephesus was built in 117 A.D as a tomb for Gaius Julius Celsus Polemaeanus, the governor of the province of Asia. The capacity of the library was more than 12,000 scrolls. It was the third richest library in ancient times after the ones in Alexandria and Pergamum.