1857 Queen Victoria chooses Ottawa, Ontario, as the capital of Canada.
1891 Street railway in Ottawa, Ontario, Canada, commences operation.
1939 The Canadian National War Memorial is unveiled by King George VI and Queen Elizabeth in Ottawa.
1982 Patriation of the Canadian constitution in Ottawa by Proclamation of Queen Elizabeth II, Queen of Canada.
1982 Turkish military diplomat Colonel Atilla Altıkat is shot and killed in Ottawa, Ontario, Canada's capital. Justice Commandos Against Armenian Genocide claim responsibility, saying they are avenging the massacre of 1.5 million Armenians in the 1915 Armenian Genocide.
1990 The Dalai Lama unveils the Canadian Tribute to Human Rights in Canada's capital city of Ottawa.
1997 In Ottawa, Canada, representatives from 121 countries sign The Ottawa treaty prohibiting manufacture and deployment of anti-personnel landmines. The United States, People's Republic of China, and Russia do not sign the treaty, however.