Abstract
The continuity of occupation at the settlement of Prague, Czech Republic from the 9th to 14th centuries makes it a good case study for investigating the evolution of animal husbandry practices during the Early and High Middle Ages. Previous archaeozoological work shows that people's dietary behaviour in Prague underwent a transformation at the beginning of the High Middle Ages (13th century).
This change has been attributed to large-scale socioeconomic transformations, which may have affected animal management practices. Stable carbon (δ13C) and nitrogen (δ15N) isotope analysis of the tooth dentine collagen of livestock (cattle, domestic pigs, sheep and goats) from three different areas in Prague (the Lesser Town, Prague Castle, and the Old Town) presented in this study provides support for this hypothesis.
The range of stable isotope values increased over time, which may, in addition to a farm-household model, indicate a more advanced system of livestock supply - for example through urban markets - and may also be explained by more diversified breeding conditions in the town and its surroundings. The results show an increase in the δ15N values in pig diet over time and suggest that their management changed.
This difference may have been caused by increased animal protein intake or higher δ15N value of the dietary sources. It has also been corroborated that the root dentine collagen of High Medieval cattle has slightly higher average δ15N values when compared to cattle from the earlier period, which could be related to gradual changes in landscape utilisation and soil processing, such as fertilisation.