The Irish Rugby Football Union (IRFU) (Irish: Cumann Rugbaí na hÉireann) is the body managing rugby union in Ireland. The IRFU has its head office and grounds at Lansdowne Road, where Irish rugby union international matches are played. In addition the Union also owns Ravenhill in Belfast, Thomond Park in Limerick and a number of grounds in provincial areas that have been rented to clubs.

http://www.irishrugby.ie/