Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Itchan Kala' has mentioned 'Fortification' in the following places:
Occurrence Sentence Text Source
The inner town has 26 hectares and was built according to the ancient traditions of Central Asian town building, as a regular rectangle (650 by 400 meters) elongated from south to north and closed by brick fortification walls that are up to ten meters high.
The boundaries of the property are appropriately drawn encompassing the high fortification walls of the city.