Irmologion Ucs by Vladislav V. Dorosh is a free Cyrillic liturgical display font with the solemn air of old church books. The letters mix broad, dark curves with tall, tapering strokes and small hooked details, giving the font a hand-drawn, chant-manuscript rhythm rather than a modern text feel.
It fits book covers for sacred music, museum graphics, historical exhibitions, Orthodox holiday posters, and title cards for documentary work where a free font needs an unmistakably ecclesiastical voice. Use it for short headings, initials, or monogram-like marks, because the letters carry so much period character on their own.