Its position is a matter of great uncertainty. That assigned to it by
Ptolemy would place it on the site of
Castelsardo (
province of Sassari) on the north coast of the island, and only about 30 km from
Porto Torres, but this is wholly incompatible with the statements of the Itineraries, and must certainly be erroneous. Indeed, Ptolemy himself places the
Tibulati or Tibulates or Tibulatii (), who must have been closely connected with the town of that name, in the extreme north of the island (Ptol. iii. 3. § 6), and all the data derived from the Itineraries concur in the same result. The position assigned it by De la Marmora, and adopted by
Smith is the port or small bay called
Porto di Lungo Sardo, almost close to the northernmost point of the island, the
Errebantium Promontorium of Ptolemy. (De la Marmora,
Voy. en Sardaigne, vol. ii. pp. 421–32, where the whole question is fully examined and discussed.) The editors of the
Barrington Atlas of the Greek and Roman World place Tibula at
Santa Teresa Gallura (
province of Olbia-Tempio). ==References==