“All religions are just as good as each other, as long as the people who practice them are honest, and even if Turks and heathens came and wanted to populate this country, then we would build mosques and temples for them”(1)
As quoted in Iron Kingdom: The Rise and Downfall of Prussia 1600-1947, by Christopher Clark, pp. 252-3. It’s a good book, about which more anon.
(1) Clark cites Otto Bardong (ed.), Friedrich der Grosse (Darmstadt, 1982), p. 542.