Originally called Block D, it was built from 1935 to 1938 for the Royal Canadian Mounted Police (RCMP).

It was renovated in 1998–2001 and now houses some of the offices of Members of Parliament.

It is similar Gothic Revival architecture design to the Confederation Building located just east of it, which was also designed by Thomas W. Fuller.

In Ian Fleming's short story "For Your Eyes Only" James Bond visits the RCMP headquarters when it was located in this building, and the book contains a description of the structure.

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