Covering more than 2.135 square metres, the collections include remains of Montréal’s first Catholic cemetery (1643), the architectural remains of the Royal Insurance Building (1861), the First Collector Sewer, an important civil engineering work (1832-1838) and the archaeological crypt that includes architectural remains of early buildings revealing more than six hundred years of history and a major feat of engineering of the 17th Century, the fortification wall of the city.

Since 1998, the collection has been enriched by the discovery of new sites and remains at 214 Place D’Youville, Fort Ville-Marie, Callière's Residence and occupation of the site are now part of the collection of in situ remains of Pointe-à-Callière. This important site, linked to the birthplace of Montréal, will open to the public in May 2017.