Urban and climatic environment
The Notre-Dame Basilica, facing Place d’Armes square in historic Old Montréal, is surrounded by office buildings, some of impressive heights, like the National Bank office and the Aldred Building. The Jardin des Sulpiciens, a vast green space, is located on the southwest side. To the south and west, low buildings create a wide opening leading down to the Saint-Lawrence River. The basilica and chapel cover a large surface area, 4,280 m² (more or less 46,100 sq. ft.). The buildings have a vast metal gable roof covered in copper sheets.