Traces of the Past Unearthed on SNJM Grounds in Longueuil

Fragments of the past resurfaced this past May on the grounds of the Congregation of the Sisters of the Holy Names of Jesus and Mary (SNJM) in Longueuil.

Coins and a button are among the artifacts found on site.

During archaeological excavations conducted at the request of the City of Longueuil, several historical artifacts were uncovered—coins, ceramic fragments, glass, nails, bones—dating from the mid18th to 19th centuries. These finds offer valuable insight into the site’s early occupation, particularly near the Foundation House.

As part of its land acquisition project, the City commissioned an archaeological potential study. The study revealed significant historical potential around both the Foundation House and Maison Notre-Dame, as well as Indigenous potential near the former Saint-Antoine stream. Based on these findings, an archaeological inventory was recommended prior to any excavation.

In parallel with the acquisition process, the City also required an environmental site assessment, which involves trenching and drilling in the identified high-potential zones. Seizing the opportunity, the City conducted archaeological monitoring during these activities. An archaeologist supervised the drilling, and the trenches served to initiate the inventory.

Initial findings indicate that Trench 1A, near 90 rue Saint-Charles Est, was the richest in discoveries. Trench 1C, located on the convent’s front lawn, revealed layers linked to the historical overflow of the former stream. In contrast, Trench 1B and the drillings did not yield significant archaeological material.

Although these preliminary findings do not warrant the designation of a protected archaeological site, they confirm the site’s historical richness. Further inventory is recommended for any future excavation work.

All artifacts remain the property of the SNJM’s, as the landowners. The final report will be submitted to the Ministry of Culture within the next year.

The pink-shaded area indicates a zone of high historical potential; the lighter area to the left shows a zone of moderate historical potential.

Sources: City of Longueuil (plans & artifacts), SNJM Archives