The Valknut symbol in a form topologically equivalent to the Borromean rings.  Found in early medieval Germanic inscriptions. For monochrome version, see File:Valknut.svg . See also Image:Valknut-Symbol-3linkchain-closed.png and Image:Valknut-Symbol-triquetra.svg .

For a more complicated three-component Brunnian link depicted with triangles, see Image:Three-triang-18crossings-Brunnian.png .
SVG version of Image:Valknut-Symbol-borromean.png .
Converted from the following PostScript code:

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