There lefts:The peristyle in Ostia
In Rome, the most people live in one room with their family. The courtyard of house had some high walls. The rich people house had a front door, and it lead into courtyard. Cross the frontdoor is parants room, it can become the office or the place you eat to guests. Some romans build some Greek-style house. The back of actium had an peristyle.
The rich roman usually take a bath in "Roman bath". The spring in Roman bath is from Mendip hills. The rain percolates down to the limestone in 2700 between 4300 metres. The water temperature is between 64*c to 96*c. The water rise there everyday 1170000 litre!