It's one of the most iconic photographic portraits in world history—and it hangs in one of the most famous buildings in the Canadian capital. At least it did, until it was stolen...

The story of The Roaring Lion theft involves international intrigue, world history, careful detective work and one of this country's most renowned artists. But most of all, it's a riveting heist tale that spans from Canada to Europe, and who doesn't love one of those?

GUEST: Brett Popplewell, author, reporter, associate professor; writing in The Walrus

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