Ballincollig Royal Gunpowder Mills was one of three Royal gunpowder mills that manufactured gunpowder for the British Government. Located in Ballincollig near Cork city in Ireland, the powder mills were originally opened in 1794 as a private enterprise, before being taken over by the British Government during the Napoleonic Wars. The mills returned for a time to private ownership in the mid-19th century, before closing permanently in 1903. In the late 20th century Cork County Council bought the mill grounds, developed a public park and opened a visitor centre. Though the visitor centre closed in 2002, many of the ruined mill buildings remain accessible in the public park