Pee’s Celtic Plain, by Pee, is a free Celtic font with a lively medieval display voice. The letters mix heavy blackletter-like silhouettes with knotwork loops, spiral curls, and carved breaks, so the alphabet feels closer to illuminated initials and stone-cut ornament than to a straightforward Gothic revival.
It fits naturally on pub signs, folk festival posters, album covers, fantasy title cards, and chapter openings where a free font can bring in that insular, hand-worked mood fast. Use it for short headlines, monograms, or drop caps especially well-the decorative knots and spirals give even a few letters enough presence to carry the page.