It was built as a defense fortification adapted to the local topography by linking mountain peaks and bridging the valleys. Following the collapse of the Baekje empire, the ramparts were rebuilt fully as stone walls. The fortress has been illuminated. It functioned both as a defense structure and a royal palace. [1] [2]: 45–46

The fortress of the capital of Baekje during the Ungjin period (475~538) was called Ungjinseong, which is now known as Gongsanseong Fortress. The Gongsanseong Fortress wall spans 2,660m in length. It is primarily a stone wall, except for the 735m-long earthen fortifications in the eastern part of the fortress.

A fortress in the Geumgang River area, Gongsanseong is one of the earliest walls made to protect Gongju, the capital of the Baekje Dynasty. It was originally earthen walls but rebuilt with stones in the Joseon Dynasty. The exact date of its construction is unknown.

The Gongju Gongsanseong Fortress was initially known as Ungjinseong and subsequently as Gongsanseong during the reign of the Goryeo dynasty. It occupies an area of 20 hectares (49 acres), presently in the Geumseong-dong and Sanseong-dong districts.

Gongsanseong Fortress is a fortification situated at the heart of Gongju, which served as the capital of the ancient Baekje kingdom (18 BCE - 660 CE) from 475 to 538. Even after Baekje's fall, subsequent dynasties such as Silla (57 BCE - 935 CE), Goryeo (918-1392), and Joseon (1392-1897) continued.

Gongsanseong Fortress, located in Gongju, South Korea, is an ancient fortress steeped in history and surrounded by scenic beauty. It served as a key defensive structure during the Baekje Kingdom, which flourished over 1,400 years ago.

Gongsanseong Fortress is on a scenic location next to Geumgang River. It would take a good 90 minutes to walk around it if the weather is pleasant. Because of the hot and humid weather, I only settled for for checking out the area near the entrance.

Located in Gongju-si, Gongsanseong Fortress is a mountain castle which was established during the Baekje Period (234-678). The castle is about 2.5km long, and there are two ways of touring the castle.

Located in Gongju-si, Gongsanseong Fortress is a mountain castle which was established during the Baekje Period (234-678). The castle is about 2.5km long, and there are two ways of touring the castle.

Gongsanseong Fortress is a fortification situated at the heart of Gongju, which served as the capital of the ancient Baekje kingdom (18 BCE - 660 CE) from 475 to 538. Even after Baekje's fall, subsequent dynasties such as Silla (57 BCE - 935 CE), Goryeo (918-1392), and Joseon (1392-1897) continued to use Gongju as a regional administrative center.