The joker below is based on a famous enigmatic painting by Jan Matejko in 1862. A copy of the painting is shown below. In the painting there is a distraught brooding court jester who contrasts dramatically with his character and the festive court ball visible in the background.
On the table lies a letter likely announcing that Poland has lost Smolensk (now in Russia) to the Grand Duchy of Muscovy, causing Stańczyk's sorrow and reflection on his fatherland's fate. The letter seems to have been discarded by some official, and only the jester realizes its significance – while the rulers are partying...(Source: Wikipedia)
A Brooding Court Jester by Jan Matejko
And thanks to Ronald Kruijmel of the FB Joker Collectors Club for first cluing me in to the origins of this joker.