NK20 by Nikola Kovanovic is a free Cyrillic serif with a refined, old-world air. The letters feel formal and poised, built from strong verticals, very thin connecting strokes, and a few sharp, calligraphic curves that give the font a slightly theatrical finish.
It makes sense in book covers, cultural posters, magazine title lines, museum graphics, and short editorial headings where that contrast can do the work. As a free font, it also suits monograms and title cards, especially when you want a classical voice with a little flourish rather than a dry historical revival.