Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Old Havana and its Fortification System' has mentioned 'City walls' in the following places:
Occurrence Sentence Text Source
The positions of the original Havana city walls are the modern boundaries of Old Havana.
Old Havana, which is defined by the extent of the former city walls, has maintained the pattern of the early urban setting with its five large plazas, each with its own architectural character: Plaza de Armas, Plaza Vieja, Plaza de San Francisco, Plaza del Cristo and Plaza de la Catedral.