Notre-Dame Montréal Tickets › Guides › Notre-Dame Basilica Montréal: Architecture, History and the Story Behind the Blue Ceiling Notre-Dame Basilica Montréal: Architecture, History and the Story Behind the Blue Ceiling Updated May 2026 · Notre-Dame Montréal Tickets Concierge Team On this page James O'Donnell and the Gothic Revival designThe polychrome interior — Father Rousselot's commissionThe Casavant Frères organSacré-Cœur Chapel — the 1978 fire and the rebuildingWhy blue, gold and red — the symbolism of the colours James O'Donnell and the Gothic Revival design The polychrome interior — Father Rousselot's commission The Casavant Frères organ Sacré-Cœur Chapel — the 1978 fire and the rebuilding Why blue, gold and red — the symbolism of the colours