Frederick was buried in Potsdam for quite a while in spite of the fact that his will declared his desire to be buried without ceremony at Sans Souci and the other fact that he loathed Potsdam, the site of his father’s alcohol and tobacco benders, with a cold fury that can only be described as Prussian. He was moved around a bit during the early 20th century until finally they buried him at Sans Souci as per his final request.
Napoleon had huge respect for Frederick the Great. This incident, the visiting of Frederick’s tomb, is a real one amidst the sea of made-up stuff we cook up with profane glee. In his writings, he ranks Frederick one of the eight greatest military leaders in all of human history (the other seven? Alexander, Hannibal, Julius Caesar, Gustavus Adolphus, Turenne, Prince Eugene and, of course, Napoleon.)
He had basically no respect for England, however. He considered them book-keepers and merchants to a man, incapable of fighting with any degree of real elan. Wellington eventually convinced him out of that.
– Count Dolby von Luckner