German state of Hesse; its borders were not clearly delineated. Its geographic center is Fritzlar; it extends in the southeast to Hersfeld on the river Fulda, in the north to past Kassel and up to the rivers Diemel and Weser. To the west, it occupies the valleys of the rivers Eder and Lahn (the latter until it turns south). It measured roughly 90 kilometers north-south, and 80 north-west.

The area around Fritzlar shows evidence of significant