We have few remains of the private houses of the Greek Posidonia, as well as of the republican phase of the Roman Paestum. The residential neighborhood (west of the site), partly brought to light by archaeological investigations, was made up of the so-called insulae, today's blocks, of regular shape, with a north/south orientation within which the houses were arranged.
The main road axes ran along the four sides and small streets or ambitus crossed them lengthwise. The homes were of very different sizes, from a minimum of 380 square meters to a maximum of 2800 square meters.
Among the houses of greatest interest, exactly in the corner between the “Via Sacra” and “Via di Porta Marina”, we find the "House with marble impluvium", a worthy and rich residence embellished with elegant mosaic floors.
The house, which dates to the early imperial period, represents the typical Roman elegant house. Has the characteristics of the "Pompeian" house, , built on the sequence in axis of three main rooms: the atrium (inner courtyard), the tablinum (reception room) and the peristilium (peristyle or porticoed garden). The facade does not have the tabernae (craftsmen's workshops) located on the sides of the entrance.
The main entrance to this large, elegant residence was situated toward south on the "Via di Porta Marina" and opened onto a large vestibule. into which the fauces, the entrance and a smaller room for the slave who acted as doorman opened.
This vestibule led to an “atrium”, in the centre of which there was a marble “impluvium” to collect rainwater, which gives the house its name. The atrium was of the type called Tuscan, that is, without columns. The four cubicula (bedrooms of the masters and family members) were situated along the sides of the atrium.
At the centre there was the “tablinum”, the welcome room. A small corridor to the side of the “tablinum” led to a peristyle, a porticoed garden (inside which the private activities of the family took place) . On the western side, there were two other rooms decorated with black and white mosaic floors: a bedroom and a triclinium, the room for receptions and meals.