The undated photo shows uncovered remains of military fortresses and residential units for soldiers dating back to the Ptolemaic and Roman periods, in the North Sinai Province, Egypt. (Photo: Xinhua)
The undated photo shows uncovered remains of military fortresses and residential units for soldiers dating back to the Ptolemaic and Roman periods, in the North Sinai Province, Egypt. (Photo: Xinhua)
The undated photo shows uncovered remains of military fortresses and residential units for soldiers dating back to the Ptolemaic and Roman periods, in the North Sinai Province, Egypt. (Photo: Xinhua)
The undated photo shows uncovered remains of military fortresses and residential units for soldiers dating back to the Ptolemaic and Roman periods, in the North Sinai Province, Egypt. (Photo: Xinhua)
The undated photo shows uncovered remains of military fortresses and residential units for soldiers dating back to the Ptolemaic and Roman periods, in the North Sinai Province, Egypt. (Photo: Xinhua)