球状アンフォラ文化
The Globular Amphora culture stretched from the middle Dnieper to the Elbe during the late 4th and early 3rd millennia BC. It has been suggested as the locus of a Germano-Balto-Slavic continuum (the Germanic substrate hypothesis), but the identification of its bearers as Indo-Europeans is uncertain. The area of the culture contains a number of tumuli, which are typical of Indo-Europeans.