Guinness beer is one of the most famous beers in the world and originated in Ireland. It was founded in 1759 by Arthur Guinness in Dublin, and since then its fame has grown globally.Guinness is a stout, which is a dark, full-bodied beer characterized by an aroma of coffee and chocolate. It is made using water, barley malt, hops and yeast, and is matured for about a month before being bottled or kegged.One of the peculiarities of Guinness is its thick, creamy foam, which is achieved through the use of nitrogen instead of carbon dioxide. This technique, along with the particular shape of the glass, helps give Guinness its characteristic creaminess.Today Guinness is available in many variants, including Guinness Original, Guinness Extra Stout, and Guinness Foreign Extra Stout. In addition, a limited edition of the beer is brewed each year to mark St. Patrick’s Day, which is celebrated on March 17 and is one of Ireland’s symbols around the world.