The undisputed capital of brutalism in the Maritimes is Charlottetown.
Here's a panoramic shot of the
Confederation Centre of the Arts, built in 1964.
To add to the fun, in the background on the right is the former
Dominion Building, which used to be the main federal office complex in the city, also built in the early 1960s.
Another couple of photos:
The main provincial office complex in Charlottetown is also brutalist.