Porter beer is a dark style of beer originating in London in the 18th century. Descended from brown beer, Porter beer is a well-hopped beer made from brown malt. The name is thought to originate from its popularity with street and river porters. The history and development of Stout and Porter beers are intertwined. Dark beers used to be called “Extra Porter” or “Stout Porter. The term "Stout Porter" would later be shortened to just "Stout".