Pilsner Urquell (German: [ˈpɪlznɐ ˈʔuːɐ̯ˌkvɛl]; Czech: Plzeňský prazdroj [ˈpl̩zɛɲskiː ˈprazdroj]) is a lager beer brewed at Asahi Breweries' Pilsner Urquell Brewery in Plzeň (German name: Pilsen), Czech Republic. Pilsner Urquell was the world's first pale lager, and its popularity meant it was much copied, and named pils, pilsner or pilsener. It is hopped with Saaz hops, a noble hop variety that is a key element in its flavour profile, as is the use of soft water. . Almost all draught Pilsner Urquell is sold filtered, but small quantities are available in limited amounts unfiltered.
https://en.wikipedia.org/wiki/Pilsner_Urquell