The Aquae Neapolitanae or Aquae Calidae Neapolitanorum are springs and their adjoining population nucleus mentioned by Ptolemy

Ptolemy

Claudius Ptolemy , was a Roman citizen of Egypt who wrote in Greek. He was a mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology. He lived in Egypt under Roman rule, and is believed to have been born in the town of Ptolemais Hermiou in the...

 as well as in the Antonine Itinerary

Antonine Itinerary

The Antonine Itinerary is a register of the stations and distances along the various roads of the Roman empire, containing directions how to get from one Roman settlement to another...

, which places them at a considerable distance inland from Neapolis

Neapolis, Sardinia

Neapolis meaning "New City", was an ancient city of Sardinia, and apparently one of the most considerable places on that island. It was situated on the west coast, at the southern extremity of the Gulf of Oristano, at the present-day località of Santa Maria di Nabui, in the comune of Guspini,...

, on the road from Othoca (near Oristano

Oristano

Oristano is a town and comune, capital of the Province of Oristano, on the island of Sardinia, Italy. It has approximately 32,500 inhabitants.Its economy is mainly based on fishing, agriculture and, to a certain extent, tourism.-History:...

) to Caralis (modern Cagliari

Cagliari

Cagliari is the capital of the island of Sardinia, a region of Italy. Cagliari's Sardinian name Casteddu literally means castle. It has about 156,000 inhabitants, or about 480,000 including the outlying townships : Elmas, Assemini, Capoterra, Selargius, Sestu, Monserrato, Quartucciu, Quartu...

), Sardinia

Sardinia

Sardinia is the second-largest island in the Mediterranean Sea . It is an autonomous region of Italy, and the nearest land masses are the French island of Corsica, the Italian Peninsula, Sicily, Tunisia and the Spanish Balearic Islands.The name Sardinia is from the pre-Roman noun *sard[],...

, Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

. They are identified with the mineral sources now known as the Bagni di Sardara, on the high road from Cagliari to Oristano. (Itin. Ant. p. 82; Ptol. iii. 3. § 7; Geogr. Rav. v. 26; De la Marmora, Voy. en Sardaigne, vol. ii. p. 406.)