This paper discusses transformations in human behavior between the Iron Age and the Roman times in the tribal territory of the Treveri, later civitas Treverorum, located between the Rhine and the Ardennes.

This aspect has been examined from two perspectives: first, from an anthropological point of view vis-a-vis the historical inhabitants, and second, from an archaeozoological perspective regarding domestic animals. Due to small sample sizes and/or difficulty in dating, both regarding humans and domestic animals, transformations in living conditions and animal-keeping could mostly be outlined only for the La Tène and Roman times.

Only the Celtic-Roman cemetery of Wederath-Belginum with continued use from middle La Tène to late antiquity offers a more complex insight into human mortality and animal offerings.

People lived longer in the Roman times but had more pathologies compared with the previous La Tène period.

Body height remained similar in the La Tène and Roman times.

However, differences existed within specific human groups (for example, warriors and craftsmen), compared to the normal population.

Sex differences in mortality persisted from La Tène to Roman times.

The faunal composition in the burials, settlements, and sanctuaries also shows changes.

Since the middle La Tène period, chickens have been present.

The first oysters can be found in Augustean times, whereas exotic birds such as crested fowls and peacocks are found only in later Roman times and are quite rare.

A new direction in animal-keeping is demonstrated via an increasing logarithmic size index (LSI) in cattle and sheep.

The multivariate methods applied in this study offer further insights into the domain and can serve as helpful tools for osteoarchaeological data analysis.