Celtic Knots by Renn Crump is a free Celtic display font combining ornate knotwork with classical serif lettering. Its letters have strong thick-thin contrast, sweeping curves, and sharp wedge-like serifs. Interlaced forms supply the medieval character.
Designers working on heritage and fantasy themes can use it for book covers, festival posters, and game graphics, where the carved-looking shapes suit heraldry and folklore. It is most convincing in historical publishing, where knot motifs become both lettering and illustration.