George Romney
George Romney (1734 - 1802) was an English portrait painter. He was the most fashionable artist of his day, painting many leading society figures - including his artistic muse, Emma Hamilton, mistress of Lord Nelson.

Lady Hamilton as Circe by George Romney, 1782
Emma, Lady Hamilton (1765 - 1815) is shown as Circe. In Greek mythology, Circe is a minor goddess of magic. Circe was renowned for her vast knowledge of drugs and herbs.

Golden rectangle
A golden rectangle is a rectangle whose side lengths are in the golden ratio, one-to-phi, that is, approximately 1:1.618. A distinctive feature of this shape is that when a square section is removed, the remainder is another golden rectangle, that is, with the same proportions as the first. Square removal can be repeated infinitely, which leads to an approximation of the golden or Fibonacci spiral.

Droste Effect
The Droste effect is a specific kind of recursive picture, one that in heraldry is termed mise en abyme. An image exhibiting the Droste effect depicts a smaller version of itself in a place where a similar picture would realistically be expected to appear. This smaller version then depicts an even smaller version of itself in the same place, and so on. Only in theory could this go on forever; practically, it continues only as long as the resolution of the picture allows, which is relatively short, since each iteration geometrically reduces the picture's size. It is a visual example of a strange loop, a self-referential system of instancing which is the cornerstone of fractal geometry. Source: Wikipedia, Droste Effect.