Plzeňský Prazdroj, known in English as the Pilsner Urquell Brewery, is a Czech brewery opened in 1842 and headquartered in Plzeň, Czech Republic. It was the first brewery to produce pale lager, branded as Pilsner Urquell, which became so popular and was so much copied that more than two-thirds of the beer produced in the world today is pale lager, sometimes named pils, pilsner and pilsener after Pilsner Urquell.[3] The brewery name, Pilsner Urquell, which can be roughly translated into English as "the original source at Pilsen", was adopted as a trademark in 1898. Pilsner Urquell is the largest producer and exporter of beer in the Czech Republic.