This is a fascinating structure, probably built in the 2nd century AD. The visit is a must for anyone interested in the wonderful connection between history and technology, architecture and science.
These Roman baths are also called The Roman Spa. In the past, they spread over a vast area of about 7 square kilometers, which ranks them as the largest in Bulgaria and the fourth largest in all of Europe.
These baths are of a type that the Romans call "a small imperial type". The place has two entrances, with identical waiting rooms on both sides - at the western entrance of the baths and the eastern entrance.
This public bath complex, one of the most important cultural sites in Bulgaria, has been well preserved. It is considered one of the most preserved sites from the ancient Roman period. The wandering between the various rooms, used two thousand years ago by the bathers here, is impressive and even a little moving.
Pay attention to the ancient and sophisticated heating system built under the bathrooms. It is hard not to be impressed by the sophisticated heating systems built by the Romans. Here they used the most advanced subterranean heating technology. It is based on hot air that came in pipes from the kitchens of the place and the room of the water tanks (praefurnium) and warmed the water. After heating the water, the air was released in the chimneys installed on the roof of the baths.
The wonderful preservation of the various intelligent systems installed here thousands of years ago enables us to see the genius of the Roman engineers and their understanding of the technology required for the supply of hot water, in an era where electricity is not used or water is heated by the sun.
Between the rooms you will see the large apoditeria halls, next to the halls used for meetings and sports (basilica termarium), where visitors were entertained before and after bathing.
The baths themselves had halls of varying heat. There were lounges in lukewarm water (frigidarium), or in hot water (tepidarium) and even in very hot water (caldarium). There were also toilets here (latrinae).
In addition to the bath infrastructure itself, the site also contains a host of other cultural artifacts. In the historical site you will find many ancient inscriptions that were well preserved. These are Roman inscriptions with wall paintings alongside them, which were then part of the usual design in public buildings and within luxurious villas. Here and there there were statues of Roman gods that adorned the baths.