St. Agnes mosaic in Sancta Sanctorum Small depiction of martyr Agnes on side wall of the Sancta Sanctorum. Small depiction of martyr Agnes on side wall of the Sancta Sanctorum.St. Agnes mosaic in Sancta Sanctorum Artist: UnknownVM number: 0047Description: Agnes, close-up view within the Sancta Sanctorum. Century: Unknown Photographer: Graham, ShalaDate Taken: 31/12/2022Location: Palazzo Lateranense, Sancta Sanctorum Chapel (Lateran Apostolic Palace)