The development of a housing estate and the construction of social housing in the town of Arrest, to the west of the Somme department, made it possible, after diagnosis, to carry out an excavation of an area of 10,000 m². A Gallo-Roman occupation is located on a plateau, overlooking the small valley of the Avalasse, stretching from the middle of the 1st century. av. J.-C. at the beginning of the IVth century. ap. J.-C. Four chronological sequences have been identified. The first, from the middle of the 1st century BC to the 1st century AD, is characterized by a series of pit structures compartmentalizing the space, inside which pits and postholes develop. The second sequence is between the end of the 1st to the 2nd century AD with the presence of a series of pits, including two hut bottoms, developing towards the northeast. The third sequence dated from the 2nd – first half of the 3rd century AD is marked by a ditch delimiting an enclosed space where there is a well, pits and a building on a rammed chalk foundation. And finally, the fourth, dated to the second half of the 3rd - beginning of the 4th century AD, includes a piece of ditch, a pit and a layer of demolition linked to the building on a chalk foundation. We will note the persistence of the ditches in the north of the excavated zone, during the four chronological sequences. It is from these ditch structures that the different occupations will develop. The furniture discovered is rich in information on the probable function of this place and its surroundings. Indeed, in the far north-east and west of the excavated area, the discovery of miniaturized metal objects, intentionally mutilated brooches and a cauldron, tokens or even the exceptional presence of a painted human fibula, having served as a tool or an instrument leaves the hypothesis that we would be close to a place of worship, located out of the way.