Constructed in 1902, Saint Stanislaus Roman Catholic School was the first separate school building built in Fort William, conceived by Father Ludger Arpin, who wished to see Roman Catholic children in their own separate school. Until then, the children had been in the Fort William public school.
The school was built on a simple symmetrical plan, and is made mainly of brick. There is minimal stonework along the bottom of the first storey and in the windowsills. The most striking feature of the building is the central crenellated tower, rising above the arched entrance. The first floor accommodated 130 pupils, and the second storey was used as a residence for the teachers, initially four Sisters of St. Joseph. St. Stanislaus closed its doors as a school in 1974.
The Lakehead District Catholic School Board offices were located here until 1998, and today houses a number of offices.