1806 The Saint-Laurent church tower was struck by lightning. The cross collapsed and the arch was damaged.
1835-1837 Demolition and reconstruction of the Saint-Laurent Church under the direction of Jean-Baptiste Gaultier, known as curé Saint-Germain.
1837 (May 15) Louis-Joseph Papineau pronounces one of the most important speeches in his career to his partisans, gathered in front of the Saint-Laurent Church.
1845 (July 1) Creation of the legal structure for the municipality of Saint-Laurent Parish.
1893 (February 27) Incorporation of a parcel of land owned by the Saint-Laurent Parish. La Corporation de la Ville de Saint-Laurent is created and City Council holds its first meeting on April 25, 1893.
Zotique Gosselin, contractor and streetlamp lighter, is appointed special constable at the August 3 meeting. As payment for his services, he is allowed to keep half of the fines he collects.
1895 The first telephone is installed at the general store.
1896 Opening of an electric tramway line connecting Saint-Laurent to Montréal.
Saint-Laurent inaugurates its first fire brigade.
1897 Laurent Beaulieu becomes the first chief firefighter in Saint-Laurent.
1899 Dominion Chicory, which harvests the chicory plant, settles in Saint-Laurent.