How to Draw Celtic Knots 20 - Celtic Cross (circular) from Book of Kells 5r 1/3

How to draw a circular Celtic Cross found on the cannon page of the Book of Kells, page 5r. The design is made up of a continuous knot and there are 5 instances of this design on this page. This is part 1 of 3. Where Jason Bellchamber shows how to construct the spine of the design using a compass, 4h pencil, and a straight edge ruler. The Celtic Cross is symbolic of the numeral 4. In this case, likely signifying the 4 Gospels of Matthew, Mark, Luke and John.