Under
Roman rule, two settlements existed in the area: Longonis and Tibula. The
first one which stood on the left side of the present harbour, was a fishermen
village. The place name Longonis seems to derive from the peculiar shape of
the harbour bay, particularly long and very good natural shelter to the boats.
The second village Tibula, was at the final stretch of the consular road.
Anyhow the Romans used that area to cut the precious granitic rocks, which
were utilized after finished to build up monuments and residences in ancient
Rome (some of Pantheon columns were made by the granite of these rocks). In
more than a place we can see huge blocks of granite ( more or less finished),
which show the signs of past working.In medieval times, during the maritime republics, the Pisans founded Longonsardo village, so that they could have a strategic point 11 miles far from corsica ruled by Genoa, Pisa's bitter enemy. The harbour strategical position favoured a new flourishing of trades and of mining industr of granites.
The
importance of Longonsardo grew considerably in XIII and XIV centuries when
it became one of the four important ports in Sardinia, toghere with Cagliari,
Porto Torres and Alghero; it was allowed there to ship or unship goods. In
1384 Eleonora of Alborea ordered to build up a castle which was destroyed
by Genoases who wanted the depopulation of hte area as well. For this reasons,
in the following centuries it became refuge of outlaws and pirates.