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thirty feet

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Part of the north wall and moat of Caesarea.  The walls are six feet in thickness and are strengthened by buttresses; they are still from twenty to thirty feet in height.  The moat is lined with masonry.  There are three ruined towers in the north wall, two of which are shown above.

Part of the north wall and moat of Caesarea. The walls are six feet i...

Public domain illustrated book page scan, related to Egypt, free to use, no copyright restrictions image - Picryl description

Remains of a crusading fort at Tantûrah. Its shattered tower is thirty feet in height.  In the distance the village of Tantûrah appears, in the site of the ancient city of Dor.

Remains of a crusading fort at Tantûrah. Its shattered tower is thirty...

Public domain image of Egyptian art, free to use, no copyright restrictions photo - Picryl description

67 CE: Working under constant fire from Roman catapults and archers, Jewish masons raise the walls of the fortress of Jotapata by thirty feet. Josephus has devised a method to protect the masons by ordering a series of palisades to be erected and overlaid with ox hides to deflect the Roman missiles.

67 CE: Working under constant fire from Roman catapults and archers, J...

Public domain illustrated book page scan, medieval or early renaissance, free to use, no copyright restrictions image - Picryl description.

Grand Colonnade, Palmyra, from the triumphal arch.  Showing the syenite columns of the Tetrapylon; the prostate one is thirty feet long and three feet in diameter. In the distance the ancient city wall, known as the Wall of Justinian, can be traced.

Grand Colonnade, Palmyra, from the triumphal arch. Showing the syenit...

Public domain image of Egyptian art, free to use, no copyright restrictions photo - Picryl description