Cast aluminum doors by Jordi Bonet commissioned in 1969 for the Salon of the National Arts Centre. The following is taken from an NAC publication:

An Advisory Committee on Visual Art chaired by Donald Buchanan was appointed in 1964 by the Canada Council to work with architect Fred Lebensold to acquire art - whether through closed competition, commission or direct purchase - for the National Arts Centre.
The committee agreed that art for the National Arts Centre should reflect its own time and should fall into three main categories 1) art built into the complex 2) art that should have a practical function 3) independant decorative art that would embellish the complex.
The result is an important permanent collection of Canadian and international visual art integrated into the very architectural fabric of the NAC complex.