Toronto has a habit of renaming things

Be they buildings or public spaces, often as a corporate branding exercise.

Sometimes you just need to know what something was called before its reincarnation, thus this formerly list of names:

• Rogers Centre formerly known as the Skydome
• The Sony Centre for the Performing Arts formerly known as the Hummingbird Centre formerly known as the O'Keefe Centre
• The Scotiabank Theatre formerly known as The Paramount
• The Canon Theatre formerly known as the Pantages Theatre formerly known as the Imperial Six formerly just The Imperial began its career as a venue in show business as the Pantages Theatre
• The CN Tower (Canada's National Tower) formerly known as the CN Tower (Canadian National Tower)
• The Fairmont Royal York Hotel formerly known as the Royal York Hotel
• Toronto formerly known as Metropolitan Toronto
• Sound Academy formerly The Docks
• Toronto Botanical Garden formerly Edwards Gardens