Roman Imperial Baths – A Masterpiece of Ancient Engineering A short walk from the museum brings visitors to one of Hisarya’s most iconic landmarks: the Roman Imperial Baths, dating back to the 2nd century AD. These baths are among the best-preserved in Southeastern Europe and are a striking testament to the technological sophistication and luxurious lifestyle of the Roman elite. The baths were constructed during the reign of Emperor Diocletian, whose name the Roman town—Diocletianopolis—bore in his honor. Built to serve as both a medical and social center, the complex includes numerous facilities such as caldarium (hot bath), tepidarium (warm bath), frigidarium