Frankenberg an der Eder is a town in Waldeck-Frankenberg district and regional center in Hesse, Germany.The mountain at a ford over the Eder north of the Burgwald range was for a long time a fortified place, playing an especially important rôle under the Franks in the Saxon Wars. The current town was built in 1233-1234 by the Thuringian Landgrave and quickly earned economic importance for its location at the junction of two trade routes.