Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Castel del Monte' has mentioned 'Prison' in the following places:
Occurrence Sentence Text Source
[3] It was later turned into a prison, used as a refuge during a plague, and finally fell into disrepair.
Occasionally used as a hunting lodge under Manfred of Sicily, the castle become a state prison under the latter's victor, Charles I of Anjou: here Manfred's sons Henry, Azzo and Enzo were kept as prisoner after 1266, as well as other Hohenstaufen supporters[3]