Lester B. Pearson Building

The Lester B. Pearson Building is the headquarters of the Canadian Department of Foreign Affairs (Foreign Affairs Canada). It is located at 125 Sussex Drive in Ottawa, Ontario, and was built between 1968 and 1973. It is named after Lester B. Pearson, former external affairs minister, Nobel Peace Prize winner and Canadian prime minister.

The Department was established in 1909 but did not establish its first foreign mission until 1927 in Washington, D.C.