The hotel has created a weekend package to mark the milestone and "savour all that is caesar."
Starting at $199 per night, it includes accommodation for two adults, caesar cocktails, caesar-inspired appetizers and a caesar-inspired breakfast in bed.
In 1969, bartender Walter Chell created the caesar -- a blend of vodka, Worcestershire sauce, Tabasco sauce, tomato juice and clam broth -- at the hotel, according to a news release.
"We like to think the caesar is regarded as a unique Canadian national treasure," said Ross Meredith, Westin Calgary's general manager.
Also, during May the hotel's Essence restaurant is featuring a caesar-themed menu that includes caesar bolognese, caesar corn dogs with spicy lime sauce, and, for breakfast, caesar benedict featuring Clamato-poached eggs.
