As the Roman Empire spread across Europe ... They were also built to strict specifications, so that their ‘hypocaust heating’ would work properly. This system used water, heated in fiery ...

It was built by the Romans nearly two thousand years ago. These stacks of tiles are part of a very clever Roman invention, the hypocaust. The hypocaust was a space under the floor where the air ...

It also explains how the Romans used a hypocaust, an underground heating system, to ensure they always had hot water. Students could use plastic construction bricks to build a model of a Roman ...