Are pilsners ales or lagers?

Footed pilsner glass filled with pale golden Würzburger Hofbräu Pilsner beer and a white foam head

Pilsners are lagers: the pale, hoppy style from Pilsen in Bohemia is brewed with bottom-fermenting lager yeast and cold-conditioned, and both Czech Pilsner and German Pils are classified as lagers in the BJCP style guidelines.