Porte de Hal
Cassel died at Friedenau near Berlin, his last words being, "Wo ist denn das Himmelreich?" (Where is it, the kingdom of heaven?) His grave is preserved in the Protestant "Friedhof I der Jerusalems- und Neuen Kirchengemeinde" (Cemetery No. I of the congregations of Jerusalem's Church and New Church) in Kreuzberg, south of Halle Gate. According to the "Allgemeine Zeitung des Judenthums",