A large obelisk, built in 1887, marks the spot where the original French-built Fort Rouillé was erected in 1750 and 1751. Its construction was ordered by the Marquis de la Jonquière, then governor of New France, in order to further establish a French presence in the area, and to intercept the trade of Indians travelling towards an English fur-trading post in present-day Oswego. It was a small palisaded fort with a bastion at each of its four corners, and containing five main buildings: a corps de garde, storeroom, barracks, blacksmithy, and a building for the officers. A drawing purported to date from 1749 shows the fort adjacent to Lake Ontario, whereas today it is situated on top of a small hill a hundred metres or so from the lake's current shoreline.