Aquae Calidae, Bulgaria Aquae Calidae, Bulgaria Aquae Calidae (Latin for warm waters), also known as Therma and Thermopolis in the Middle Ages, was an ancient town in Thrace located in the territory of today's Bulgarian port city of Burgas. It was built around thermal baths using the hot springs and became one of the most important spa centres of ancient times. The site and baths of Aquae Calidae have been visited in the course of history by several important rulers from Philip II of Macedon to the Eastern Roman emperors Justinian I and Constantine IV, the Bulgarian ruler Terwel and the Ottoman Sultan
Aquae Regiae Aquae Regiae Aquae Regiae was a Roman town in the Roman province of Byzacena, during the Roman Empire and into late antiquity. The Latin adjective referring to it is "Aquaregiensis". The bishop of this town, Massimiano, participated in the 411 Carthage conference, between the Catholic bishops and Donatist bishops of Africa and was at the other Carthaginian council of 419. Another bishop was among the Catholic prelates summoned in 484 to Carthage by the Arian king of the Vandals, Huneric. The bishop of the town was exiled after this conference. Today Aqua Regie survives as a titular bishopric of the