Built around 1871, the Blockhaus de la rivière Lacolle was then part of the defence network used by the British colony. It was built to protect the sawmill and the lighthouse, both located on the Lacolle River (the lighthouse sent light signals between La Pointe de Fer and the Île-aux-Noix fortifications), it was an outpost for the British garrisons stationed in the Upper Richelieu area and Lake Champlain.
Between 1814 and 1937, the Blockhaus has changed ownership many times. To enlarge the living space, two appentices were added on either side of the building in 1858. People working for the Bowman and Bullock families resided there until 1935, when the last of them left for good.
This 1781 building, unique in Québec, has maintained its original structure. If you look carefully, you will notice holes left by musket balls. Admire exhibitions recounting the history of this military outpost and explaining the building's special architecture.