There is a tower within the fortress, for decades described as the "Mysterious Tower". It has no windows and its purpose was complete unknown. Archaeologist supposed it might be a mosque or a pantry of some kind. During the 2010s surveys prior to the reconstruction, the table was discovered, placed by one of the legionnaires of the Roman emperor Claudius. He built the tower and dedicated it to the supreme Roman God, Jupiter.The inscription on the boulder tablet below the fortress there is inscription "To Jupiter, the greatest and the mightiest, the standard-bearer of the "Legio VII Claudia" Gaius Licinius Rufinus dedicates the table".