Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Convent of Christ in Tomar' has mentioned 'Keep' in the following places:
Occurrence Sentence Text Source
It has an outer defensive wall and a citadel (alcxc3xa1xc3xa7ova) with a keep inside.
The Keep, a central tower of residential and defensive functions, was introduced in Portugal by the Templars, and the one in Tomar is one of the oldest in the country.