Social status and diet. Reconstruction of diet of individuals buried in some early medieval chamber graves from Poland by carbon and nitrogen stable isotopes analysis

The study presents results of the investigations of diet based on carbon and nitrogen stable isotope ratios (delta C-13 and delta N-15) of the bone collagen of individuals buried in medieval elite chamber graves from the territory of the state of the first Piasts, Poland (the second half of the 10th and the first half of the 11th century). The aim of the research was to determine the diet of individuals buried in such funerary structures, to compare this with commoners buried in ordinary graves, and investigate any sex-related patterns. Rib bone samples were taken from individuals buried in chamber graves at Bodzia, Dziekanowice, Pien and Sowinki. Results indicate that the elite male diet was based on C-3 plants with possible contribution of some C-4 plants (millet) and substantial consumption of animal proteins including fish. The bone collagen delta C-13 and delta N-15 of male chamber burials suggested consumption of higher trophic level foodstuffs (meat and fish) whilst the female diet, and that of the juveniles, was similar to the commoners in the rest of the population.