<p>One very basic form of Celtic or pseudo-Celtic linear knotwork.
For alternative forms, see <a href="//commons.wikimedia.org/wiki/File:Celtic-knot-basic.svg" title="File:Celtic-knot-basic.svg">Celtic-knot-basic.svg</a>, <a href="//commons.wikimedia.org/wiki/File:Celtic-knot-twoloops-bigends.svg" title="File:Celtic-knot-twoloops-bigends.svg">Celtic-knot-twoloops-bigends.svg</a> , <a href="//commons.wikimedia.org/wiki/File:Bar-knot-basic-decorative.png" title="File:Bar-knot-basic-decorative.png">Bar-knot-basic-decorative.png</a>, and <a href="//commons.wikimedia.org/wiki/File:Celtic-knot-basic-rectangular.png" title="File:Celtic-knot-basic-rectangular.png">Celtic-knot-basic-rectangular.png</a>.
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For variant forms of a basic (pseudo-)Celtic knotwork cross, see <a href="//commons.wikimedia.org/wiki/File:Knotwork-cross.svg" title="File:Knotwork-cross.svg">Knotwork-cross.svg</a> , <a href="//commons.wikimedia.org/wiki/File:Knotwork-cross-multicolored.svg" title="File:Knotwork-cross-multicolored.svg">Knotwork-cross-multicolored.svg</a> , and <a href="//commons.wikimedia.org/wiki/File:Knotwork-cross-alternate.svg" title="File:Knotwork-cross-alternate.svg">Knotwork-cross-alternate.svg</a> .
AnonMoos (PostScript source and PNG); Erin Silversmith (first SVG conversion)
SVG version of <a href="//commons.wikimedia.org/wiki/File:Celtic-knot-basic-linear.png" title="File:Celtic-knot-basic-linear.png">Celtic-knot-basic-linear.png</a>