In 3700 BC, the first coastal dwellers came to the dunes, where the Hague residential area of Ypenburg now stands. They grew grain and kept pigs and cows, but also lived by hunting and fishing. This is the New Stone Age, people used pottery and flint tools. They buried their dead in burial fields, and such a burial field was found during the construction of Ypenburg. From this burial field, four skulls were selected for a  facial reconstruction, a young woman named Ypje, an older woman, a young child and an older man. The older man, Ypje and the child were also done in bronze.