Aquae Calidae, Bulgaria well as from Kabyle, Mesambria (now Nessebar), Odessos, Histria, Tomis, Byzantium, Abdera, Maroneia and the islands of the Aegean, the oldest from Apollonia Pontica from the 5th century BC. The first baths at the Sanctuary of the Three Nymphs originated when the Roman Empire under Lucullus conquered the region, during the Third Mithridatic War in 72 BC. Under Trajan (98-117) nearby Anchialos became the administrative centre of the region and the baths were expanded and extended with two more swimming pools. During this time the Via Pontica was built connecting Constantinople via Deultum, Anchialos, Aquae Calidae with Dorostorum and Sexaginta
Aquae Calidae, Algeria has shown the abundance of evidences about Aquae Calidae Christian past. Occupied by the Vandals in the fifth century and damaged, the city was recovered to "Romanitas" by the Byzantines and regained importance during the sixth century. Conquered by Arabs around 700 AD, Aquae Calidae nearly disappeared in the next two centuries. Aquae Calidae, Algeria Aquae Calidae was a Roman colony of the Roman province of Mauretania Caesariensis. The Roman city has been identified with ruins at Hammam Righa in the wilaya of Chlef, Algeria, North Africa. The ruins are located at latitude 36.379474N, longitude 2.395618E near the railway town