Tumulus culture
In Central Europe, the early Bronze Age Unetice culture (1800–1600 BC) includes numerous smaller groups like the Straubingen, Adlerberg and Hatvan cultures. Some very rich burials, such as the one located at Leubingen (today part of Sömmerda) with grave gifts crafted from gold, point to an increase of social stratification already present in the Unetice culture. All in all, cemeteries of this period are rare and of small size. The Unetice culture is followed by the middle Bronze Age (1600–1200 BC) Tumulus culture, which is characterized by inhumation burials in tumuli (barrows). In the eastern Hungarian Körös tributaries, the early Bronze Age first saw the introduction of the Makó culture, followed by the Otomani and Gyulavarsánd cultures.