[left] Maurits Cornelis Escher: Cimino Barbarano, 1929 (in Escher's "Italian" period). This reproduction of the original print has been horizontally compressed and segments on the right side and of the left side of the image have been removed.
[right] John Martin: The Bard, ca. 1817. The colors of the original painting have been completely desaturated and segments on the top and the bottom of the image have been removed.

As for calling this "allusion", I am just polite.

See also: flipsideflorida.wordpress.com/2013/03/06/escher-the-bard