Schmuck Initialen 2 by Dieter Steffmann is a free Gothic initials font with the feel of an illuminated manuscript. The letters pair a bold blackletter core with a square ornamental frame of curling leaves and thorny vine forms, so the font reads less like plain lettering and more like a set of heraldic initials.
It fits book covers, chapter openings, certificate headings, poster titles, and monograms where one letter needs a strong medieval accent. As a free font, it is especially useful for drop caps, title cards, and branding details that benefit from that enclosed, woodcut-like border around each initial.