The Dicket Mead villa, a Roman ruin which was originally built in the 3rd century AD. The full extent of the Dicket Mead villa was never fully excavated. Its baths, now known as the Welwyn Roman Baths were only one of at least four buildings in total.
The complex was probably a farm, and may have also formed a country retreat for a wealthy merchant from London or St. Albans. It has also been speculated that it might have been at least in part the equivalent of an hotel, lying as it does near the Roman roads from London to Chester.
About half of the original extent of the baths is now on display. Visible parts remaining include the hypocaust, the tepidarium (warm room), caldarium (hot room) and the frigidarium (cold room) floor and cold bath, constructed from opus signinum.