Lager (German: storage) is a type of beer made from malted barley that is brewed and stored at low temperatures (originally in caves) and is the most widely-consumed and commercially available style of beer in the world.

The first Irish lager brewery (Darty Brewing Co.) was established in Dublin in 1892, but only lasted five years.

A second attempt was made with the wonderfully named Regal Lager Brewery Ltd. (in Kelis, county Meath) in 1937. It lasted slightly longer, closing in 1954.

Serious lager brewing began when Guinness converted the Great Northern Brewery in Dundalk to produce Harp in the 1950’s.

Harp is still probably the best known Irish Lager brand.