Tivoli Brewing Company brings historic Colorado beers back to life The Tivoli Beer story traces its roots to 1859 when German immigrant John Good founded a brewery in the newly settled town of Denver. Known as the Rocky Mountain Brewery, Sigi's Brewery, the Milwaukee Brewery, and in 1900 renamed Tivoli, the brewery would become one of the largest breweries in the West, selling its light golden lager nearly everywhere west of the Mississippi until closing its doors in 1969. In 2012, a group of Colorado Natives formed Tivoli Brewing Company to bring historic Colorado Beers back to life.