[2][3] The Gothic Revival church was designed by Montreal architect Alexander Francis Dunlop.

It is noteworthy for its false apse housing church offices and for its Casavant Frères organ.

Its congregation founded the first YMCA in North America on November 25, 1851 (before the present church building was built) and led an active campaign for women's suffrage early in the 20th century.

The side lights represent the cardinal virtues, Justice, Prudence, Temperance and Fortitude.

In 1927, to cover upkeep costs, the church permitted a commercial building to be built in front of its Sainte Catherine Street façade.