Human remains resulting from sophisticated mortuary treatments represent a preferred information source about the organization of societies and about the belief systems of ancient people. Thereby, on the archaeological field, secondary deposits, sacred artefacts made of human bones or dismembered burials emerge as precious raw material in order to reconstruct gestures, practices and finally the symbolic discourse built around those dead who are selected to become particular protective entities, perhaps Ancestors. This work includes the study of double-funerals ceremonies and manipulations of human bones in funerary or ritual contexts but also complicated pre-funerals treatments (exposure, dismemberment, mummification) in a transcultural and transchronological perspective. Human remains and spacial data from archaeological contexts have been analysed using bioanthropological and traceological approach in order to reconstruct complex mortuary operating sequences. An ethnoarcheological study on multiple-steps funerals has been led in order to interpret archaeological remains.