During the course of the second Punic War the name of Paestum is not
unfrequently mentioned in Roman annals, and owing its revived prosperity
to its annexation by Rome, it is not surprising to find the existence of a
strong feeling of gratitude amongst the inhabitants. At the date of fatal
Cannæ this faithful Greek city sent assurances of unswerving allegiance to
the Senate, and also more substantial help in the form of all the golden
vessels from its temples. It was Paestum also that early in the third
century B.C. supplied part of the ill-fated fleet of Decius Quinctius,
that was raised to run the blockade of Tarentum. But even the loss of its
ships and men did not deter this loyal city from coming forward a second
time with expressions of fealty and promise of further aid to the great
suzerain city in this dark hour of its difficulties. From this point
onward till the close of the Republic, History is almost silent with
regard to Paestum; but its numerous coins go far to attest its continued
welfare, for it now shared, together with Venusia, Brundusium and Vibo
Valentia, a special right to strike money in its own name and with its own
devices. Under the Empire, Paestum managed to uphold its size and
importance, so that it became the capital of one of the eight Prefectures
into which the district of Lucania had been divided. At this period, there
can be no doubt, the surrounding plain was in the highest state of
cultivation, whilst its prolific rose-gardens—_biferi rosaria Paesti_—have
supplied the theme of every Roman poet from Vergil to Ausonius. Yet in
spite of its apparent prosperity, the seeds of coming decline had already
been sown. Strabo tells us that even in early Imperial days the city was
obtaining an unenviable reputation for malaria: a circumstance that was
due to the over-flowing of the unwholesome streamlet, the Salso, whose
reeking and fever-bearing waters began to impregnate the earth.
Engineering works on a large scale were planned to remedy this drawback,
but these were never executed, and in consequence the unhealthiness of the
place increased. With the decline of the Roman power the population and
prosperity of Paestum likewise tended to lessen, so that its citizens were
placed in a worse position than before with regard to the carrying out of
this vast but necessary scheme of sanitation.