Rest room Reveal!!!
It might normally take a number of days to heat up the thermae (until it had a hot thermal spring close by to draw water from), so the fireplace within the furnace was stored continuously burning, for the baths have been all the time in use. This was achieved with a hypocaust, said to have been invented by the Roman engineer Sergius Orata. The hypocaust was an empty house that existed underneath the ground of certain rooms in the baths, crammed with pillars to carry up the floor while a furnace burned in a close-by area and let the new air move into it. There have been hollowed out tubes within the partitions to not only draw away the smoke, but to permit the recent air to warmth the partitions in addition to the ground. Often the water supply—the one which wanted heating anyway—was also close to the furnace before …
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