Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Pergamon and its Multi-Layered Cultural Landscape' has mentioned 'City walls' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| This Roman new city was able to expand without any city walls constraining it because of the absence of external threats. | WIKI |
| The exceptional composition of monuments includes the extremely steep theatre, the lengthy stoa, a three-terraced Gymnasium, the Great Altar of Pergamon, the tumuli, pressured water pipelines, the city walls, and the Kybele Sanctuary which was perfectly aligned with Kale Hill. | UNESCO |