The church's Gothic Revival architecture is among the most dramatic in the world; its interior is grand and colourful, its ceiling is coloured deep blue and decorated with golden stars, and the rest of the sanctuary is a polychrome of blues, azures, reds, purples, silver, and gold. It is filled with hundreds of intricate wooden carvings and several religious statues. Unusual for a church, the stained glass windows along the walls of the sanctuary do not depict biblical scenes, but rather scenes from the religious history of Montreal.

Moving closer to the main area you can see just how vibrant this is. In 1657, the Roman Catholic Sulpician Order arrived in Ville-Marie, now known as Montreal; six years later the seigneury of the island was vested in them. They ruled until 1840. The parish they founded was dedicated to the Holy Name of Mary, and the parish church of Notre-Dame was built on the site in 1672. Looking up is the link below: http://www.robertcain.info/gallery/4207957/1/248578924/Large

By 1824 the congregation had completely outgrown the church, and James O'Donnell, an Irish-American Protestant from New York, was commissioned to design the new building. O'Donnell was a proponent of the Gothic Revival architectural movement, and designed the church as such. He is the only person buried in the church's crypt. O'Donnell converted to Catholicism on his deathbed perhaps due to the realization that he might not be allowed to be buried in his beautiful church. It also has a Casavant Frères pipe organ, which comprises four keyboards, 97 stops, almost 7000 individual pipes and a pedal board