On Christmas day in 1950, the Stone of Scone was removed, heist-style, from Westminster Abbey. Some believed it to be an act of theft, and others, liberation.
Research:

Behind the Scenes Minis: Piece of Work
17:48

E. Virgil Neal: Hypnotist, Fraudster, Tycoon, Part 2
41:22

E. Virgil Neal: Hypnotist, Fraudster, Tycoon - Part 1
35:28