Gebetsbuch Initialen by Dieter Steffmann of Typographer Mediengestaltung is a free medieval initials font built around blackletter capitals. Each letter sits within a square frame filled with curling leaves, fine hatch marks, and woven flourishes.
A heritage publisher or museum shop could build a manuscript-inspired identity across historical books and packaging. The letters also fit fantasy game graphics and seasonal event materials. In editorial work, they can act as illuminated opening initials that connect a page to medieval ornament.