Droste Effect

Droste Effect- "a Dutch term for a specific kind of recursive picture[1], 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"

Image: http://www.cwrl.utexas.edu/~schacht/rhe309k/lukefuszard/intro.html