J Dueck:
found this too
J Dueck:
two pattern sketches
J Dueck:
icthus
J Dueck:
six unit pattern
J Dueck:
double thread pattern
J Dueck:
a common motif
J Dueck:
outer loops
J Dueck:
detail of celtic knot
J Dueck:
celtic knotwork
J Dueck:
knot a bit closer
J Dueck:
detail of celtic knot