There are a lot of Celtic style patterns on the internet and available for sale.  I am continuing to work on my collection.  Here are a few more that I have done.
This  doily is designed by  Debbie Arnold..  The pattern has 2 more rounds, but I am thinking about making it larger by repeating it again from the round of blue split rings.

Next are some of the other things I have tatted.  Most are done in my favorite thread.