Wealthier families, and those who could afford houses, typically built them around atriums like the ones found in the bathhouses. The rooms inside of the houses usually contained painted plaster walls and may have had walls and floors featuring mosaics (small pieces of stone or glass).
Many of the houses had pipes, which carried water into the home, in addition to underground heating systems. The homes’ exteriors were built of stone, and many were able to survive for centuries.