Recent data for the funerary site of Lannemezan plateau and new insights into the Final Neolithic at the foothills of the western Pyrenees (abridged version)

A rescue excavation at the site of Centre mobilisateur 10, located in the south-east of the Lannemezan agglomeration (Hautes-Pyrenees) and otherwise known as the Arsenal, was carried out in 2016 by the Eveha team, under the leadership of V. Ropiot. From a geographic perspective, this sector, between Bigorre and Comminges, occupies an interface position on a fluvio-glacially formed plateau, culminating at an altitude of 600 m at the foothill of the Pyrenees, and forms a vast expanse of land including heaths, bogs, meadows and some woodland.The excavation completely uncovered a circular tumulus with a pebble enclosure, which was the main aim of the operation. However, it also brought to light ten archaeological structures, including a singular megalithic monument, composed of a monolithic slab surrounded by a pebble border, covering a chamber buried in a vast oblong pit, with a frontal entrance.The other structures consist of six fireplaces with heated pebbles, two isolated post holes and a pit containing middle Bronze Age objects, which were plundered or heavily reworked but appear to be linked to worship rituals. All these structures are located in the central part of the excavated zone, around the tumulus, and towards the east for the hearths, including two developed in the crown of the tumulus. These remains are attributed to a period ranging from 3700 to 1400 BCE, centred around the Final Neolithic 2. They form an unprecedented monumental funerary complex in the High-Pyrenees.