Some neat ones I found:
Nice Claddagh image
Found this labyrinths in Italy, Great Britain, Finland, and many other places these two from Finland (left) & Italy on a Vase and on Italian Petroglyphs (middle) & on Petroglyphs in North America(right)
Brigid, pre-Christian celtic/Ireland & Celtic tree of life
The Mosaic image on the left is an amazing room of mosaics in Galla Placidia & the one on the right is indicated to be 2,000 years old? Click it to go to its 'source' = hm.