Straffan's ruined parish church (St. Patrick's) in the graveyard at the centre of the village can be dated to the 15th century from its distinctive bell cote, and defensive living quarters over the main building in the manner of Oughter Ard and other local churches. The Church of Ireland (1833) has stained glass windows by Alfred Child and Catherine O'Brien and several monuments to the Barton family. It was modelled on churches in France. The Catholic church (1787, rebuilt 1987) was also the site of the national school until 1963. It is part of Straffan's proud ecumenical tradition that the Catholic community used the Church of Ireland while their own church was undergoing reconstruction.