"Gorffwysfa" is more or less the equivalent of "mon repos" in the Welsh language - a resting place. It is the original name of the official residence of the Prime Minister of Canada, located in the New Edinburgh neighbourhood of Ottawa, Ontario. Partly because of the difficulty of pronouncing Welsh it is now usually referred to more prosaically as 24 Sussex Drive. Built between 1866 and 1868 by Joseph Merrill Currier, Gorffwysfa has been the Prime Minister's official home since 1951. It is one of two official residences made available to the prime minister, the Harrington Lake estate in nearby Gatineau Park being the other.

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