The seminary by the Basilique Notre-Dame and its grounds are closed to the public, but you can look at them through the gate. The Catholic order of Sulpicians was given title to the entire Island of Montréal in 1663. The order built the seminary in 1684 and the 3rd-floor apartments of the old seminary have been occupied ever since.
The clock on the facade was a gift from French king Louis XIV in 1701; it is believed to be the oldest working clock in North America. Ancient oaks shade the rear garden laid out in 1715.