Bock is a strong lager of German origin. Several substyles exist, including maibock or helles bock, a paler, more hopped version generally made for consumption at spring festivals; doppelbock, a stronger and maltier version; and eisbock, a much stronger version made by partially freezing the beer and removing the water ice that forms.
Originally a dark beer, a modern bock can range from light copper to brown in colour. The style is very popular, with many examples brewed internationally.
Read more about Bock: History, International Variations