The Irish Open was a hard court tennis tournament founded in 1879 as the Irish Championships, a major tennis tournament of the late 19th to early 20th centuries. It was played at the Fitzwilliam Lawn Tennis Club in Dublin, Ireland. Also known as the Irish Lawn Tennis Championships it remained a major tennis tournament alongside Wimbledon and the Northern Championships until the early 20th century. It was the first tennis tournament to feature a Ladies' singles event. The tournament continued to be played under its original brand name until 1972, when it was rebranded as the Irish Open or the Carroll's Irish Open Championships.