Earlier this century I was a guest at a fine dinner, held in a citadel of aristocratic Catholicism, for youngish members of German student duelling societies. My hosts were splendidly courteous, some of them held deadly straight rapiers or lethal curved blades, there were brightly coloured and golden braided costumes that made King Rudolf of Ruritania’s coronation robes seem dowdy, and we sung a rousing anthem about Prince Eugene of Savoy smiting the fearful Turk at the battle of Zenta in 1697.