The eight large windows at the nave together with the other six at the transept and two at the sacristy are arched. There were originally eight large windows at the transept until the walling up of the two fronting Victoria Street. The original timber louvred casements of the windows were replaced by glass shutters with green glass in 1937. The stained glass windows in the lunettes of the nave and transept windows were presented to the cathedral by Bishop Charles Arsène Bourdon.