One Canada Square Canada Square was completed and open for business. His Royal Highness The Duke of Edinburgh officially opened One Canada Square on the morning of 26 August 1991, and unveiled a commemorative plaque at the entrance to the building. Hundreds of construction workers attended the opening ceremony. The Duke of Edinburgh addressed some 800 invited guests, many of whom had been involved in the project. He spoke of the "large, airy space and clean, efficient office layout", as he declared the building ready for business. The attendees heard a specially-commissioned piece of music performed by a 30-strong choir. Paul Reichmann, Chairman
Canada House future Macdonald House, located at 1 Grosvenor Square in Mayfair, in 1961. In 1993, Canada House was closed by the Canadian government as a cost-cutting measure with the intention of selling it. A change of government in Canada saw this decision reversed and renovations were planned instead, beginning in 1997. The building was officially reopened by Queen Elizabeth II, as Queen of Canada, in May 1998. To commemorate the reopening, a detachment from the 3rd Battalion, Princess Patricia's Canadian Light Infantry, came to London and mounted the Queen's Guard at Buckingham Palace. Canada House was closed again in 2010 and