Measurements of Sr, Ba, Mg and Ca. Sr/Ca concentration ratios (green circles), Mg/Ca (red circles), and Ba/Ca (yellow circles) for AG104 (left) and AG93 (right). Squares representing the averages of 12 individuals from the Tirup cemetery (left) and 77 individuals from the Dominican Friary in Schleswig (right), in the same colour code as the circles. The average ratios from Tirup and the Dominican Friary in Schleswig are also listed in Table 1. The error bars represent ± 2 standard deviations of the analytical uncertainty.