Lester B. Pearson Building

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Lester B. Pearson Building.
Lester B. Pearson Building entrance.

The Lester B. Pearson Building is the headquarters of the Canadian Department of Foreign Affairs, Trade and Development, currently operating as Global Affairs Canada. It is located at 125 Sussex Drive in the Lower Town neighbourhood of Ottawa, Ontario, and was built between 1968 and 1973. It was officially opened on 1 August 1973 by Queen Elizabeth II.[1] It is named after Lester B. Pearson, former external affairs minister, Nobel Peace Prize winner and Prime Minister of Canada.

It was designed by the Toronto-based architectural firm of Webb Zerafa Menkes.[1]

The building consists of four "towers", of which three are interconnected from the first to the fifth floor.

In 2019, work began towards renovating the building, with major changes being made to both the interior and exterior. Walls will be torn down and individual offices removed in favour of a new activity-based working model. The project is estimated to cost $700 million and is scheduled to be completed in 2028.[2]


  1. ^ a b "A look inside the enigmatic 'Fort Pearson'". Ottawa Citizen. Canwest. 5 June 2008. Archived from the original on 21 August 2009. Retrieved 20 November 2008.
  2. ^ "Rehabilitation of the Lester B. Pearson Building". Government of Canada.

Coordinates: 45°26′13.13″N 75°41′45.79″W / 45.4369806°N 75.6960528°W / 45.4369806; -75.6960528