A decorative knot with 15 crossings and five-fold rotational symmetry (partly a variation on a design in George Bain's Celtic Art: The Methods of Construction, but changed from 6-fold symmetry to 5-fold symmetry and given rather different artistic rendering).  For a version with three-fold symmetry, see File:12crossing-decorative-knot-triskele.svg.
Self-made image, converted from a version of the following vector PostScript source code:
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300 396 translate 1.5 dup scale 18 rotate 5{/y 1.1 def/z .75 def -15.1572
51.1194 moveto -33.0803 106.281 lineto -28.0356 107.92 -22.5461 107.488
-17.8201 105.08 curveto 17.8201 86.9199 lineto 22.5461 84.512 28.0356
84.0798 33.0803 85.719 curveto 20.7196 123.761 lineto 20.7196 -12.3607 y
mul add 123.761 38.042 y mul add -40 z mul -111.301 add 56.5684 z mul
57.9495 add -111.301 57.9495 curveto stroke/x .3 def 20.7196 123.761
moveto -20.7196 68.2385 lineto -41.4392 x mul -20.7196 add -55.5225 x mul
68.2385 add -53.3013 27.3811 -53.3013 1.3811 curveto stroke 72 rotate}
repeat showpage
%EOF
AnonMoos