I love to walk in different parts of Montreal. The architecture changes depending on the year the area was developed as well as the clientele it was developed for. Even that evolved over the years as neighbourhoods deteriorate over time and more recently have been gentrified.
In many parts of the city you can see these three floor buildings with flats on each floor. Outdoor staircases lead up to the second floor. Some sweep up dramatically, while others march up in a straight line.