Interweave

The other week I saw an interweave design entwined around the letter H in a medieaval manuscript.  I liked the combination of interlocked squares and and vesica piscis (it turns out the vesica piscis is not a true one).  So I set out to make something similar.  

The arcs on the false vesica pisci are quarter-circles cut on the diagonal; I had to fiddle with the placement and settled on having the arcs start one square in on the straight interweave—if I had used a proper arc starting at the arcs' intersection points, the interweave would have badly distorted the squares in the outer diagonals of the interweave.  

Without the H in it, this version puts me into mind of open-mouthed snake heads, and I can almost see this being used in a Viking design of some sort.