23/10/2026
While the rest of Europe sat around campfires, Roman emperors walked barefoot on warm marble.
On the Palatine Hill, behind Domitian’s palace, the floors still hold the remains of a heating system built 2,000 years ago.
It’s called a hypocaust, and it worked in a surprisingly simple way:
🧱 The floor was lifted on small brick pillars.
🔥 Fires burned underneath.
♨️ Hot air traveled through the empty space and warmed the marble above it.
No electricity, no gas, just fire and a very clever design.
Thanks to it, baths, private chambers and libraries stayed warm all winter long, and so did entire wings of the palace. It was a luxury reserved for the Roman elite.
And the best part is that, two thousand years later, you can still see those original floors, with the Colosseum in the distance.