Premise: Pilsner (also pilsener or simply pils) is a type of pale lager. It takes its name from Plzeň (Pilsen in Czech Republic), a city in Bohemia, then in the Austrian Empire, now in the Czech Republic, where it was first produced in 1842. The world’s first blond lager, the original Pilsner Urquell, is still produced there today.
Hypothesis: Pilsner was developed prior to the Napoleonic Wars.