One of the biggest ancient Greco-Roman city of Dobrogea, Callatis, is called nowadays Mangalia. Unfortunately, like other ancient sites, the modern city was built on the ruins of the past. The archaeological discoveries and the evidences of the ancient literature certify the fact that Callatis was founded by colonists who came from Heraclea Pontica, a creation of Megara, sometime at the end of the 6th century BC. It is the only Dorian colony on the shores of the Romanian Black Sea. During 1993-1994, Mangalia’s Museum of Archaeology Callatis initiated in the former Hotel Scala - now Hotel President - extensive archaeological rescue research triggered by the repair works of the hotel. On this occasion, there was discovered the remains of a Roman-Byzantine neighbourhood of the ancient city of Callatis.