Westmount Summit in the context of Mount Royal Park

Mount Royal (French: Mont Royal, IPA: [mɔ̃ ʁwajal]) is a mountain in the city of Montreal, immediately west of Downtown Montreal, Quebec, Canada. The city's name is derived from its name.

The mountain is part of the Monteregian Hills situated between the Laurentians and the Appalachian Mountains. It gave its Latin name, Mons Regius, to the Monteregian chain. The mountain consists of three peaks: Colline de la Croix (or Mont Royal proper) at 233 m (764 ft), Colline d'Outremont (or Mount Murray, in the borough of Outremont) at 211 m (692 ft), and Westmount Summit at 201 m (659 ft) elevation above mean sea level.

Saint Joseph's Oratory of Mount Royal (French: Oratoire Saint-Joseph-du-Mont-Royal) is a Roman Catholic minor basilica and national shrine located at 3800 Queen Mary Road in the Côte-des-Neiges neighborhood on Mount Royal's Westmount Summit in Montreal, Quebec. It is a National Historic Site of Canada and is Canada's largest church, with one of the largest church domes in the world. Founded in 1904 by Saint André Bessette in honour of his patron saint, Saint Joseph, the Oratory is the product of numerous architects and thousands of workers in a process spanning six decades. With its monumental scale, Renaissance Revival facade and contrasting Art Deco interior, the Oratory is recognizable not just in Montreal but around the world, attracting more than 2 million visitors and pilgrims to its steps each year.

The Oratory is the highest building in Montreal, rising more than 30 metres above Mount Royal's summit, allowing it to be seen from many kilometres away. It is the only building that violates the height restriction under the municipal building code of Montreal, which limits the height of any building, including skyscrapers, from surpassing the height of Mount Royal.