(via Reply of the Zaporozhian Cossacks - Wikipedia, the free encyclopedia)
Mehmed demanded that the Cossacks submit to Turkish rule. The Cossacks, led by Ivan Sirko, replied in an uncharacteristic manner: they wrote a letter, replete with insults and profanities. The painting exhibits the Cossacks’ pleasure at striving to come up with ever more base vulgarities.
(via ipd)