Archaeologists in Poland have uncovered a 1,000-year-old cemetery containing human skeletons near the remains of a fortified medieval settlement in the village of Borkowo.

The graves date to the era of Poland’s conversion from paganism to Christianity, and researchers describe the individuals as among the region’s “first Christians.”

Despite their faith transition, the deceased were buried with grave goods such as arrowheads, a battle ax, knives, rings, and carnelian beads — a pagan custom.

Researchers clarified that contrary to some media claims, the site is not a mass burial of Mieszko I’s warriors but a cemetery of single graves from his period, Live Science has reported.

The skeletons are now undergoing anthropological analysis, which may reveal more about the individuals’ lives, including signs of healed injuries.