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The cryptoporticuses of ancient Arles
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The cryptoporticuses of Arles form the base of the central public square of the ancient Roman city. These foundations, which take the form of three U-shaped galleries facing east, were intended to stabilize the esplanade on a naturally sloping ground. Dug into the rock to the south or into embankments to the north, they provided a vast terrace capable of supporting the forum of the Roman colony founded in 46 BC.
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