Since Pompeii is a Roman city it has become a preserved sample of what the baths were like. Most private homes did not have their own baths because of the complexity of heating them and the amount of space they required.
The water was heated on one area and directed to the other parts of the building through ducts in the walls and raised floors that allowed water to flow underneath them.
There were separate dressing rooms for men and women, and three different temperature bath areas; cold, warm and hot. The lady’s dressing area was more plainly decorated than the men’s.