Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Monastery and Site of the Escurial, Madrid' has mentioned 'Fortress' in the following places:
Occurrence Sentence Text Source
Built primarily from locally quarried gray granite, square and sparsely ornamented, El Escorial is austere, even forbidding, in its outward appearance, seemingly more like a fortress than a monastery or palace.