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Clergue Blockhouse

831 Queen Street East, Sault Ste. Marie, Ontario, P6A, Canada

Formally Recognized: 1980/03/31

Looking north-west from Bay Street (Ermatinger Old Stone House in background); City of Sault Ste. Marie
Clergue Blockhouse, 2005
Looking north-east from Bay Street (Algonquin Hotel in background); City of Sault Ste. Marie
Clergue Blockhouse, 2004
Looking north-east from Bay Street; City of Sault Ste. Marie
Clergue Blockhouse, 2005

Other Name(s)

Ermatinger-Clergue National Historic Site
Clergue Blockhouse

Links and documents

Construction Date(s)


Listed on the Canadian Register: 2006/06/27

Statement of Significance

Description of Historic Place

The Clergue Blockhouse consists of an upper log structure on an uncut fieldstone base. Originally located on the St. Mary’s Paper site, adjacent to the Canadian Canal, the Blockhouse is now located to the east of the Ermatinger Old Stone House at the corner of Bay and Pim Streets in downtown Sault Ste. Marie.

It has been recognized for its heritage value by the City of Sault Ste. Marie, By-Law 80-113.

Heritage Value

The Clergue Blockhouse is one of Sault Ste. Marie's most significant buildings because of its early association with the North West Company Post, a fur trading company, and its later association with F.H. Clergue, an American industrialist who established a powerful industrial complex in Sault Ste. Marie at the turn of the 20th century.

The stone walls of the Clergue Blockhouse were constructed in 1819 of uncut fieldstone and are the only remains of the North West Company Post in Sault Ste. Marie. Stark and simple in its design, this former powder magazine is an example of unadorned, wilderness architecture used by early fur trading companies.

The upper log structure, designed as a blockhouse in the style of those constructed during the Indian Wars of the preceding one hundred years, was added in 1894 by the American entrepreneur Francis H. Clergue for use as his residence and early office. The original location of this 'bachelor apartment' at the St. Mary's Paper plant allowed Clergue to survey early industries under his control including a hydro-electric plant, a pulp and paper mill, a steel plant, and a rail and marine transportation network at the industrial site located at the confluence of Lake Superior and Lake Huron, adjacent to the Canadian Canal.

The Blockhouse continued to be used as a residence for some years, however it gradually fell into disuse and was badly burned in 1974. In 1996, the Blockhouse was moved to its current site where, through community efforts, it has been restored for interpretation as a historic site.

Sources: Sault Ste. Marie Designation By-law 80-113; Clergue Blockhouse Designation Report

Character-Defining Elements

Key character defining elements that reflect the structure's value as an example of unadorned, wilderness architecture used by early fur companies include its:
-uncut fieldstone construction
-several gun barrel openings

Key character defining elements associated with Francis H. Clergue's modification of the structure for use as a residence include its:
-log walls
-stone fireplace
-counter balanced attic stairs
-early original electric heating system
-wooden staircase




Recognition Authority

Local Governments (ON)

Recognition Statute

Ontario Heritage Act

Recognition Type

Municipal Heritage Designation (Part IV)

Recognition Date


Historical Information

Significant Date(s)

1894/01/01 to 1894/01/01
1996/01/01 to 1996/01/01

Theme - Category and Type

Developing Economies
Trade and Commerce
Peopling the Land

Function - Category and Type




Military Defence Installation

Architect / Designer

North West Company



Additional Information

Location of Supporting Documentation

Community Services Department, Recreation and Culture Division, City of Sault Ste. Marie

Cross-Reference to Collection

Sault Ste. Marie Museum; Sault Ste. Marie Public Library Archives

Fed/Prov/Terr Identifier




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