[1][2] The cathedra of the Bishop of Clogher was moved to Monaghan town in the mid-19th century.

Architect James Joseph McCarthy (1817–1882) designed the cathedral in a 14th-century Gothic architectural style was begun in 1862.

Architect William Hague Jr. (1840–1899) from Cavan oversaw the building of the spire after 1882, which stands 88 metres high, as well as the gate lodge.

[1][2] The cathedral was renovated and the beautiful interior was simplified and left feeling bare.

For those looking to pray to the Blessed Sacrament, the tabernacle can be found out of immediate eyesight on the right hand side of the sanctuary.