1. Like the caldarium frescoes, the room is also painted in the Second Style. 2. A trench found behind the caldarium dated back as early as the Augustan period. 3. What set this caldarium apart was the sheer scale of the room compared to its predecessors. 4. The Roman bathhouse consisted of three areas, the caldarium , the tepidarium, and the frigidarium. 5. The caldarium had vaulted ceilings, raised floors, and channels in the walls to conduct heat. 6. The frescoes in all rooms but the " caldarium " reflect the advice of contemporary Arab physicians. 7. Room no . 29 featured a hypocaust heating system, which probably had a caldarium , or hot plunge bath above it. 8. One time he was entertained by performers dressed as stars and constellations, suggesting a connection to the sky painting in the caldarium . 9. The caldarium , heated by a brazier underneath the hollow floor, contained cold-water basins which the bather could use for cooling. 10. The caldarium revealed a drain that conducted water from the hypocaust floor, that conducted heat for a bath or room in a Roman home.
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