Source: Rebecca Cook / Reuters (29 January 2017), via The Atlantic.
This is the first time I've seen, in person or a photograph, a poster or billboard containing only a QR code—with no accompanying text.1 The code contains a link to this clip from Charlie Chaplin's The Great Dictator (1940):
One exception was a Google recruiting ad on the side of a bus shelter from ca. 2011, but I can't find any reference to it. ↩