The Cathedral of the Immaculate Conception in Sligo, Ireland, is the cathedral church of the Roman Catholic Diocese of Elphin. It was opened on 26 July 1874 by Cardinal Paul Cullen of Dublin and consecrated on 1 July 1897. The cathedral was built in a Norman Style, and it is the only Norman styled cathedral in Ireland. It can seat 1400 people. It has an impressive spire at the front and large apse in the Sanctuary.