Evolution of funerary practice in the Neolithic collective tomb of La Chaussée-Tirancourt -The megalithic gallery grave of La Chaussée-Tirancourt was excavated from 1967 to 1975. Formerly the monument had been altered at various times, but probably never included any megalithic covering. Its long and contrasted stratigraphy has already been published. It reveals layers of human bones contrasting with layers of sediment, all due to human activity. The monument received the bodies of deceased people throughout the recent and late regional Neolithic, between the second half of the fourth millennium BC and the extreme end of the third. The excavations made it possible to observe a significant evolution of the mode of inhumation in the course of...