BoingBoing’s no-text post with this image, posted November 12, 2013, is titled “Fragmentary evidence of the lost ancient art of librarian miniaturization,” which counts as a shenanigan, I think.
The image is all over the internet, sometimes with a citation to the Archives of Prague Castle. [UPDATE, November 14: I’ve just received an email from Martin Halata, head archivist at Prague Castle, who tells me the photograph is not from their archives.] It’s even got lolz versions in Czech [I found these a few days ago but now I can’t find them anymore and it’s driving me crazy].
I used Google’s nifty image search mechanism to discover that — as far as I can tell — this image first appeared on the internet on April 22, 2013, at Lost and Found in Prague. The photographer is M. Peterka and the date is unknown. [Some versions of the image appear with a date of ca. 1940; some say the person in the picture is a man; others say it is a woman.]
MAJOR UPDATE, January 2023: Piotr Kowalczyk of “Reader Updated” has found the original source of this image. It appeared on page 35 Fotorok, volume 58, Issue 1, 1959, with the caption (in Czech): “Archivy chystají velkou jarní výstavu československé státní myšlenky na Pražském hradě,” translated by Kowalczyk as “The archives are preparing a large spring exhibition of the Czechoslovak state idea at Prague Castle.” The photographer was Miroslav Peterka, and the location was the Clementinum in Prague.