Shamrock Rovers, formerly of Milltown but now based in Tallaght, are the most successful club in the country, with 21 League of Ireland titles. They were also the first Irish side to reach the group stages of a European competition when they qualified for the 2011–12 UEFA Europa League group stage. The Dublin University Football Club, founded in 1854, are technically the world's oldest extant football club.Rugby: A New Zealand History by Ron Palenski, Auckland University Press (2015) – However, the club currently only plays rugby union. Bohemians are Ireland's third oldest club currently playing football, after Belfast's Cliftonville F.C. and Athlone Town A.F.C. The Bohemians–Shamrock Rovers rivalry not only involves Dublin's two biggest clubs, but it is also a Northside-Southside rivalry, making it the most intense derby match in the county.
Shamrock Rovers, formerly of Milltown but now based in Tallaght, are the most successful club in the country, with 21 League of Ireland titles. They were also the first Irish side to reach the group stages of a European competition when they qualified for the 2011–12 UEFA Europa Lea.gue group stage. The Dublin University Football Club, founded in 1854, are technically the world's oldest extant football club.Rugby: A New Zealand History by Ron Palenski, Auckland University Press (2015) – However, the club currently only plays rugby union. Bohemians are Ireland's third oldest club currently playing football, after Belfast's Cliftonville F.C. and Athlone Town A.FC. The Bohemians–Shamrock Rovers rivalry not only involves Dublin's two biggest clubs, but it is also a Northside-Southside rivalry, making it the most intense derby match in the county.