Such a building is typically constructed at an intersection of streets or railway tracks that meet at an acute angle.
One of the most famous is the Flatiron Building in New York City, which was finished in 1902.
At one time there were only ten flatiron buildings in Canada, with six within Ontario.
The design of Moses Block was inspired by the famous Flatiron Building in New York City.
1906 Built 2012 National Trust for Historic Preservation Media related to Buildings called flatiron at Wikimedia Commons