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stonework laid up without mortar. There are 4 types: random, polygonal, quadrilateral, and ashlar
floor paving or wall covering made from slabs of marble fitted in a variety of geometric shapes
concrete work with a facing of small, irregularly shaped stone blocks ca. 300-100 BC
concrete work with a facing of small, squared stone blocks laid up in a diamond pattern ca. 50 BC - 100 AD
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