Built as a post office from 1902 to 1906, this building became a museum in 1982 when it was purchased by the City of Sault Ste.

The site was chosen at the corner of Queen and East streets, as it was close to the winter road leading into the city.

In 1951, the Department of Defence authorized a room in the Pine Street Armoury to be used as a library/museum, and the 49th Field Artillery Regiment, RCA Historical Society merged with the Sault Ste.

Marie Museum commissioned the local 2310 Army Cadets, 46 Sea Cadets, 155 Borden Grey Air Cadets and other volunteers[10] for the Crochet Poppy Project, to crochet Remembrance poppies for a display draping through the skylight, and draping out front including about 5,000 crocheted poppies[11] The building was designed by Chief Dominion Architect David Ewart, employing Italianate, Romanesque Revival and Neoclassical features, making it an excellent example of the Eclectic architectural style.

The imposing base is constructed of local Jacobsville sandstone, with red brick above and topped with copper cornices.

[1] The building features Romanesque arched windows, Italianate decorations, and Victorian Classical cornices, a projecting front entrance, as well as hardwood floors and an oak staircase and trimmings.

The turret on the south corner extends to the height of the first floor, and is built of rounded stones with three rectangular windows.

[1] The tower bell was crafted by John Taylor Bellfounders of Loughborough, England, and was shipped along with the clock.

The Walter Wallace Military Gallery, named after Lt. Col. Walter Wallace, former commanding officer of the 49th Field Regiment and past President of the Royal Canadian Legion Branch 25, features the military history of the Sault.

It includes many artefacts, diaries, trench art, medals, and information of major battles Saultites fought in.

The second floor features the Skylight Gallery, showcasing an in-depth history of Sault Ste.

It displays artefacts of the Indigenous first peoples of the region, including a birch bark wigwam and canoe, as well as information and artefacts from the region's history of fur trading, the War of 1812 (including a model replica of the HMS Caledonia), mining, lumbering, nursing, policing and fire management.

[2] The third floor features the Marine Gallery, showcasing the maritime history of the Great Lakes, including model replicas of the Chicora and the SS Edmund Fitzgerald.