Thanks to a link provided by AntonioLao I was able to come up with this image of Borromean Rings. It is the same as my Venn Diagram used in my An Idea.
Standard diagram of the Borromean rings
A realization of the Borromean rings as ellipses
Coat of arms showing padlocks locked in Borromean rings configuration
The Borromean rings give examples of several interesting phenomena in mathematics. One is that the cohomology of the complement supports a non-trivial
Massey product. Another is that it is a
hyperbolic link: the complement of the Borromean rings in the 3-sphere admits a complete hyperbolic metric of finite volume. The canonical (Epstein-Penner) polyhedral decomposition of the complement consists of two ideal octahedra.
It is also a reported molecular crystal structure, though a bit more complicated. Given that I think it may be the structure of the quarks in my An Idea. 
Crystal structure of
molecular Borromean rings reported by
Stoddart et al. Science 2004, 304, 1308-1312
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