The “Matryoshka Principle” is a metaphor for a relationship of “object-withinsimilar-object” that appear in other natural and crafted objects such as the Matrioshka brain, the Matroska media-container (able to hold many different types of content streams), and in self-similar fractal patterns and dimensions. The onion is a similar metaphor where, as the outer layer of an onion is peeled off a similar onion exists within.