Interesting about the use of getty images.
That aside, it’s fascinating to see the one in particular depicting the mechanisms for heating of the floor/rooms, and the heating of water for the baths.
If I remember history correctly, the Romans made a big deal about sweating. They saw it as a form of cleanliness by sweating out the body’s impurities. So the elites (rich and/or military leaders) had heated baths/saunas built everywhere they took over for the elites to make themselves more pure than their subjects.