In a famous legend, Frederick the Great threatens to take the windmill next to his palace at Sanssouci. The miller answers: Ja, Ew. Majestät […] wenn das Kammergericht in Berlin nicht wäre! Yes, Your Majesty, if it were not for the court in Berlin. The saying Es gibt noch Richter in Berlin, there are still judges in Berlin, goes back to a French verse anecdote by François Andrieux from 1797.
The real case of the miller Arnold came to a head in 1779, and it ended the other way. Frederick overruled the judges. He wrote that a court that commits injustice is more dangerous and worse than a band of thieves. The judges involved lost their offices. The other judges of the Berlin court refused to convict their arrested colleagues. Frederick then sentenced those judges himself to a year in the citadel of Spandau.