Certainly the main tourist attraction in Bath is the ancient Roman bath complex. In Roman times the city was called Aquae Sulis. It is possible that Constantine, later to be both Emperor and a Christian of sorts was here in the late third century A.D.. Here are some shots of the Roman Bath complex from the outside…
To orient ourselves a couple of maps will help us. 
This complex can actually be dated to the first century A.D. due to an artifact found there.
Why was this bath placed here? Because of the huge underground thermal water source— see below.
English (US) · 