Original: In 1821 districts were created in Hesse, including the districts Hersfeld and Rotenburg, which stayed nearly unchanged (except a short period after the revolution of 1848 when they were dissolved) through the annexion of Hesse-Kassel (or Hesse-Cassel) by Prussia and the creation of the Hesse state.
Simplified: In 1821 districts were created in Hesse, including the districts Hersfeld and Rotenburg, which stayed nearly unchanged after Hesse-Kassel was taken over by Prussia.