The “Amazing painting” is a really famous painting of The Night Watch. No, not that one.
The “Amazing painting” is sometimes fake. The fake one is missing a hat on the figure in the center!
Once placed in the museum, the description provided on the plaque will read,
The Night Watch, Rembrandt van Rijn, 1642
A painting of a city militia that was found, after the restoration of the work, to take place in the daylight.
The Night Watch, Rembrandt van Rijn, via Wikicommons
The Bardic Unicorn 