Archaeological studies of this place are sporadic and with varying degrees of success. Since 2008, thanks to the Municipality of Burgas, the site has been working systematically throughout all the archaeological seasons. The fortress wall of the ancient city is revealed with a thickness of 2.60m, and 4.85 m at the northern entrance. It has a monolithic structure of processed stone blocks and rows of bricks bonded with mortar. In the central part of the fortress, a large church from the 6th - 14th centuries, has been discovered and researched that gives new insights on the importance of the city and as a religious centre.
During the excavations, the central hall of the baths is fully revealed, called in the antiquity "caldary" - a place for hot mineral water treatments. It has a total area of 220 sq. m., and two rectangular swimming pools measuring 3 x 5 m. located on both short sides. The heating system is revealed - a "hypocaust" of special clay pipes, which runs hot air from the hot water channels and heats the stone slabs on the floor.
The ancient catchment of two hot springs, with a temperature of between 53 and 42 degrees, is found 30m northwest and is connected to the bath with a complex system of collectors and clay water-mains. An important discovery is the catchment of cold water in the northern part of the 5,3-meter-long bath complex, which has also been used for healing procedures in the so-called “Frigidarium” – a pool with lukewarm water. Interesting results have been obtained by excavating 8 premises in the eastern wing of the bathing complex, where shops and kitchens were probably located. They relate to the final stage of the functioning of medieval baths between the X and XII century, completely burned down in 1206 by the Latin Emperor Henry II.
Underlying geological drillings and archaeological analysis of the site show that the depth of the cultural layers is over 9 m and artefacts from IV - I millennium BC are found. This means that further research is expected to discover earlier facilities, probably related to habitation around the mineral springs used by people and considered as sacred since ancient times.