|The 1904 Droste cocoa tin.|
Droste effect is a phenomenon named after the image of a woman in a 1904 Droste cocoa tin designed by Jan Misset, in which the woman is holding an object containing a smaller image of her holding an object containing a smaller image of her, and so on.
Droste effect is an example of recursion in which a picture appears within itself and a smaller picture is contained in the small picture and continues, and so on. Examples of phenomena similar to Droste effect are concentric circles and concentric squares in Namkha.
The structure of the holy city (the cosmos) is governed by iteration and recursion. The intersection of two equilateral triangles to form a hexagram is iteration. The presence of the hexagram in different parts of itself is recursion.
A hexagram is an Odu Ifa divided into the sixteen principal Odu. Each principal Odu is itself a hexagram comprised of sixteen Odu, such that there are 256 Odu in Ifa literary corpus.
The phenomenon in which an Odu is a hexagram recursively comprised of itself is Droste effect.