One such restroom was completed beneath Place d'Armes in 1934, designed by architect Jean-Omer Marchand in the Art Deco style, at a cost $51,255.

The work unearthed the former public washroom, along with the walls of the previous Notre-Dame Church and a water well called the "Puits Gadbois.

"[3] In 2018, after a successful campaign led by an Indigenous high school teacher, the Bank of Montreal removed a plaque to Paul de Chomedy celebrating how he personally killed a Haudenosaunee chief in March 1644.

[5][6] The teacher expressed criticism of how the removal was done, arguing that the BMO should have placed another plaque next to it telling the story from an Aboriginal viewpoint instead.

It disappeared soon after, during the American invasion of Montreal (November 1775 – June 1776), and was only found several years later at the bottom of a well in the square.

[9] Located between Saint Jacques and Notre-Dame streets, Place d'Armes is a departure point for calèches offering horse-drawn tours of Old Montreal.

An 1801 plan to extend Place d'Armes down to Saint-Antoine Street to offer a more commanding view of Notre-Dame basilica was never realized.