Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Fortifications of Vauban' has mentioned 'Fortifications' in the following places:
Occurrence Sentence Text Source
An initial selection of eight sites was formed in 2005, followed by a final list of fourteen sites, out of the 150 fortifications left by Vauban.
It crystallises earlier strategic theories into a rational system of fortifications based on a concrete relationship to territory.