The article offers an identification and short description of thirty-four earlier unidentified printed leaves with Cyrillic text currently preserved at the Swedish National Archives in Stockholm. The leaves belong to three Cyrillic incunabula editions printed in Cracow in the 1490s: a Horologion, a Lenten Triodion, and a Festal Triodion. They constitute, to the best of our knowledge, the first Swedish Cyrillic incunabula fragments described. The leaves arrived in Uppsala as filling in the binding of a copy of Apuleius Asinus Aureus. The copy was taken as war booty in Poland in the 1620s, and the leaves were later transferred to the National Archives.