This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Slaven. The Spread of Slavs in the Balkan Peninsula and the CarpathianDanubian space The author of this map was the renowned cartographer August Heinrich Petermann According to Henry Robert Wilkinson Maps and politics of the ethnographic cartography of Macedonia Liverpool England University Press the author of the explanatory text