They include a stone pedestal with steps, coloured terracotta roof decorations with lion-shaped dripstones, an extraordinary gorgon and a moving depiction of Aphrodite.
Then there are seven bull heads, an altar with groves in the stones to collect sacrifice liquids and hundreds of ex votos, with votive offerings.
Images of Eros riding a dolphin in the way of Poseidon, the god who gave his name to the city, are a stand out.
Tiziana D'Angelo, the Director of the Paestum archaeological site, said that the dig was set to "change the recorded history of ancient Poseidonia".
"It is almost like window on a 500-year-long fragment of the life of the city that Greeks from Sybaris founded in 600BC and was then conquered by the Lucanians before becoming a colony of Rome," D'Angelo said.
It's a truly unique context that "shines a very interesting light on ancient religious life", Culture Ministry Museums Director General, Massimo Osanna, said.
He recalled that the archaeological research done at Paestum in the 1950s around the site's big temples was not scientifically documented.
A new excavation campaign was launched in 2020, but it was soon halted by the COVID-19 pandemic and resumed a few months ago.
"What we have before us today is the moment in which the temple was abandoned, between the end of the second century BC and the start of the first, for reasons that are yet to be clarified," D'Angelo said.
Analysis of the clay decorations made it possible to date its foundation to the first quarter of the fifth century BC, when some of the most important monumental buildings that are still with us today were built – the Temple of Hera, built between 560 and 520BC, and the Temple of Athena, which dates back to 500BC.
The Temple of Neptune, on the other hand, was completed later, in 460BC.
The 'little temple' (tempietto) is small, measuring 15.6 metres by 7.5 metres, with four columns at the front and seven on the sides.
Like the others, it is in the Doric order, but it is distinguished but the purity of its shapes.
"It is the smallest peripteral Doric temple that we know of from before the Hellenistic period, the first building that Paestum fully expresses in the Doric canon," explained Gabriel Zuchtriegel, the former director of the Paestum archaeological site who is now in charge of Pompeii and has just published a major study on Doric architecture.
"It's almost a model, a small version of the big Temple of Neptune (which must have been in construction at the time), a sort of missing link between the sixth and fifth century BC."
So it is very important, in part because, to some degree, it demonstrates the community's artistic and cultural autonomy and disproves those who have always believed that the colonies limited themselves to copying the works of the motherland.
The range of objects found in the space that separates the front of the building to the altar is extraordinary too: terracotta statuettes with the faces of the donors or of divinities, with 15 featuring a little Eros riding a dolphin, and miniature temples and altars.
They are little masterpieces of craftsmanship that are in addition to the seven bull heads found around the altar, perhaps "props" for the cleric.
D'Angelo said that they seem to have been placed on the ground with devotion, "as if in a rite of closure" when the temple, which was still used in the Lucanian period, went into disuse with the arrival of the Romans in 273BC.
"There's a surprise every day," said the director, surrounded by a team of archaeologists coordinated by Francesco Mele.
It will take time to understand more as study, restoration and laboratory tests will be needed.
In the meantime, research is continuing to document every period in the life of the temple up to its construction, with the aim of also understanding why part of the city wall collapsed on the back of the building.
There are "very many" elements of major interest D'Angelo said, with unbridled excitement.
These include the signature on one of the statuettes with the dolphins of the Avili, "a family of potters, almost known in Delos, whose presence in Paestum had never been documented".
Then there is the very special position of this temple, built in the city but far from the centre and from the other temples, right by the city walls and very near to the sea, almost looking out onto it.
"The ships that passed by found it in front of them," she pointed out.
Then there are the cherubs on the dolphins and a Roman coin from the third century BC that had Eros riding a dolphin on one side and Poseidon on the other.
Was the temple named after the god whose name was given to another city? "It's too early to say," D'Angelo said.
"But it's an extremely interesting hypothesis".
In short, it is just an idea to ponder on during the wait for the excavations to shed more light on history.
ANSA (Silvia Lambertucci)