Suspensura

Suspensura is the architectural term given by Vitruvius[1] to piers of square bricks (about 20 cm × 20 cm) that supported a suspended floor of a Roman bath covering a hypocaust cavity through which the hot air would flow.

[2] This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed.

Cambridge University Press.

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Remains of the thermae in Glanum , on the southern outskirts of Saint-Rémy-de-Provence , France