Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Aachen Cathedral ' has mentioned 'Frederick Barbarossa' in the following places:
Occurrence Sentence Text Source
Following Charlemagne's canonization by Frederick Barbarossa in 1165, the chapel became a draw for pilgrims.
This artwork was a donation of Emperor Frederick Barbarossa and his wife Beatrice.
In 1165, on the occasion of Charlemagne's canonisation, Emperor Frederick Barbarossa again opened the vault and reinterred his remains.