Saint Carthage the Elder (or Carthach) was an Irish bishop and abbot in the sixth century. His feast day is 5 March. The saint is mainly known as a disciple and successor of Ciaran of Saighir (the Elder) and the tutor and fosterer of his greater namesake, Saint Carthage of Lismore (also known as Saint Mochuda). In the barony of Clanmaurice is a townland called Monument on which are some scant remains of an ancient church called Cill Cartaig (Carthage's Church). There is a short paragraph about St. Cartha in The Martyrology of Donegal: a Calendar of the Saints of Ireland (1864) by , page 65: