Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Capital Cities and Tombs of the Ancient Koguryo Kingdom' has mentioned 'City walls' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| Guonei City played the role of a supporting capital after the main Koguryo capital moved to Pyongyang; it is one of the few plains city sites with stone city walls still standing. | UNESCO |