The Beamish and Crawford brewery was founded in 1792, when two merchants, William Beamish and William Crawford, went into partnership with two brewers, Richard Barrett and Digby O’Brien. They purchased an existing brewery on a site in Cramer's lane that had been used for brewing since at least 1650 (and possibly as early as 1500). In 1805, its output was 100,000 barrels per annum – up from 12,000 barrels in 1792. It remained the largest brewery in Ireland until overtaken by Guinness in 1833.