Figure 1

Geographical location of the necropolises in Bulgaria. Black triangles specifically indicate the locations of the considered archaeological sites while the grey dots refer to current Bulgarian provinces. The map is plotted using https://www.freepik.com/, processed with Adobe Illustrator CS6 and modified with Photoshop CS6 (2012) by Dimitar Spassov - web developer (dimitarspassov@gmail.com) and Desislava Nesheva. Image is attributed to valeria_aksakova/Freepik.