International audience This work is founded on the study of near 400 architectural cells and 50 domestic unities on the Languedoc oppida, established from the Late Bronze Age to the 1st century BC. It examines successively the evolution of the construction technics, buildings plans, covered or not surfaces, characteristic domestic unities, space use and house connexion with social and economic habits. If some variations happen, stone construction increase, four cornered plans generalization, surface extension specially with store-rooms, however the space use and the whole house thought do not change: between the late 6th century and the late 1st century BC, the same setting designs persist, which proves that the protohistoric people give always the same precise answer to their essential needs. If, under the stranger stimuli, the human collectivity organization changes in Languedoc, however the domestic whole is very conservative.