Königsstrasse, the principle procuring Road Kassel was initial mentioned in 913 Advert, because the location where two deeds were signed by King Conrad I. The location was known as Chasella or Chassalla and was a fortification in a bridge crossing the Fulda river. There are lots of however unproven assumptions https://seobureauutrecht03567.blogrelation.com/32899733/google-options