Here is a celtic cross project based on a gravestone I saw in New Hampshire.
A celtic cross is a latin cross with a circle superimposed where the beams intersect. Frequently, it also contains knotwork decorations on the cross and/or the circle.
Photos of celtic cross gravestones have moved to a new page.
A gravestone in New Hampshire inspired this project. The details on the JPEG image of the gravestone are hard to see, but I used the same basic pattern in my drawing. I made a few modifications.
I started by drawing it on plain paper using Iain Bain's knotwork techniques (which I've described on my knotwork page).
After I drew the image in pencil, I inked it with a technical pen and scanned it in to my Mac. I colored it with software and converted it to Web-friendly file formats and resolutions.