This is the fourth building in the city to house a Post Office. Later it was taken over for a Roman Catholic Boys School, and at that time a fourth floor mansard roof was added. It currently houses a postal museum known as Toronto´s First Post Office, operated by the Town of York Historical Society.

This property’s contribution lies in its location within the Original 10 Blocks of Toronto and its historic role in the industrialization of the District and the Original 10 Blocks in the early 20th century.

The group of structures on this property share attributes which contribute to the physical character of the District and characterize the industrial buildings within the District, including red brickwork, uniform elevations with repetitive windows and bays, large building footprints and a lack of porosity at street level.

The property has a significant relationship with neighbouring properties in the same block (254 and 256 King Street East), which jointly constitute the Ontario Design Centre, and contribute to the contemporary economic character of the District.

• Architect - John Richards  <-- More buildings by this architect.
• Architect - Stone Kohn Architects  <-- More buildings by this architect.