Originally built between 1828 and 1853, this church features a central copper tower and an elaborate interior. It was enlarged in 1866 by Victor Bourgeau, and became a cathedral when the diocese was created in 1933.

Housed in the former market building (1859), this museum presents interesting displays on the Amerindian presence and the military history of the Upper Richelieu and the "Valley of Forts." It also features a unique collection of pottery and..

With its white tower and Neoclassical entryway, the structure (1816) resembles a New England church. Today it serves the Roman Catholic parish of St. Thomas More, as well as the Anglican community.