formally arranged into an organised playing code by the Gaelic Athletic Association (GAA) in the late nineteenth century. It is the most popular sport in Ireland The game is played at underage, minor (under 18), under 21 and adult levels. All players are amateur, although players at a high level may receive income from sources such as sponsorship and grants. Gaelic footballers play for a local club or parish team, with the best chosen for the inter-county sides. County players may be chosen to play in inter-provincial Railway Cup games or for the 'International Rules' team to face Australia. The main national competitions are the inter-county All-Ireland Senior Football Championship and National Football League, also known as the NFL. A Gaelic football year starts with pre-season competitions and the NFL. In early summer, the Championship begins. Each of the four provinces has its own tournament, and teams which are knocked out must do well in the 'qualifiers' if they are to gain a spot along with the four Provincial Champions in the All-Ireland quarter-finals. The All-Ireland Senior Football final is traditionally held on the third Sunday in September. Kerry are football's most successful team, with 37 All-Ireland senior titles. There are a number of rivalries within the game – an example is that between Dublin and Meath. Other notable derbies or rivalries include Cork v Kerry, Mayo v Galway, Kerry v Dublin and Tyrone v Donegal. Hurling Hurling is a sport native to Ireland for several thousand years, organized by the Gaelic Athletic Association. In terms of attendance figures, hurling is second only to Gaelic football. Hurling is the fastest field sport in the world. The game has similarities to shinty and hockey. However the ball (or sliotar) is rarely played along the ground. Hurling is played on a large grass pitch. Many aspects of the organisation of hurling are similar to football, as both sports are organised by the GAA. Amateurism and the club/county/province structure are similar. Gaelic football has a larger footprint in terms of top-level competition, but in several counties where both sports are played, hurling sometimes holds precedence, and in certain parts of the country, it is the dominant game (Kilkenny, rural Antrim, Ards peninsula in County Down, and Clare, for example). Hurling is well-attended at elite level and the highest-level games fill Croke Park to its capacity of over 82,000. The main competitions are the