The interior has many fine medieval monuments, carrying effigies and other sculptures. Among them are
the earliest dated monument (1285) which commemorates the son of Henry de Ponto of Lyra; It is
between the pillars of the north aisle; also in the north aisle, the
monument to Edmund Purcell (1549),
Captain of Ormonde's Gallowglasses: this carries a mailed half-figure, the emblems of the passion and a
reference to the denial of St Peter - a tomb bearing the figure of Franciscan Bishop de Ledrede, who
died in 1360; in the south transcept of the choir, a monument to a prominent member of the confederation,
Bishop Rothe; in the south transcept , the altar tomb of the 1st Viscount Mountgarrett, with an armoured
effigy; near by, the tomb of Bishop Walsh (1585); in the south aisle, a female effigy wearing the old Irish
cloak; the tomb of Bishop Hacket (1478), also in the south aisle. At the south-west end of the nave is a
black marble twelfth-century font. 'St Ciaran's Chair' in the north transcept is also of black marble, with
thirteenth-century sculpture on the arms.