Halmisanseong at Yongin /용인 할미산성

Archaeologists excavated Halmisanseong fortress at Yongin,  Gyeonggi Province in 2015 to find out it was built by Silla, one of the three kingdoms in ancient Korea.

The stone-walled fortress has been believed used for a short time and discarded.

Roof tiles have not been discovered yet around the fortress whereas many storage pits have.