Map of the northern Balkans in the 6th century AD, with the Roman provinces, major settlements and roads.
Own work based on:

Geophysical map taken from DEMIS Mapserver, which are public domain, other wise self-made.
Map of the cities listed in Hierocles' Synecdemus after Ernest Honigmann, Le Synecdèmos d'Hiéroclès et l'opuscule géographique de Georges de Chypre, Brussels 1939
Florin Curta, The Making of the Slavs - History and Archaeology of the Lower Danube Region, c. 500–700, Cambridge University Press 2001, ISBN 978-0521802024
John F. Haldon, Warfare, state and society in the Byzantine world, 565–1204 Routledge 1999, ISBN 978-1857284959.
Cplakidas