Proper noun
Pantocrator
The ruler of everything, especially as an epithet for Jesus Christ; an artistic depiction of Jesus in this aspect.
John II built the monastery of the Pantocrator (Almighty) with a hospital for the poor of 50 beds. Source: Internet
One mosaic they documented is Christ Pantocrator in a circle, which would indicate it to be a ceiling mosaic, possibly even of the main dome which was later covered and painted over with Islamic calligraphy that expounds God as the light of the universe. Source: Internet
For For Christ Pantocrator seated in a capital "U" in an illuminated manuscript from the Badische Landesbibliothek, Germany. Source: Internet