I thought it would be fun to repost some ancient concepts from the Holt and Greber plans here.
Original concept for the Ottawa city Hall and the Mackenzie King bridge. This would have been interesting as it would have defined the west of the canal as the federal realm and the east side with a more civic focus:
This pre-Queensway vision for the Hurdman Bridge area approach to Nicholas kind of reminds me of Nüremburg, a bit scary: