RR-, Bolesław V the Shy, 1243–1279, Denar, ca. 1254, Kraków, mint mark

According to the latest research, this coin is attributed to the Duchy of Kraków and Bolesław V the Chaste around 1254.
On the obverse, St. Stanislaus is depicted with his attributes—two eagles guarding the body of the slain bishop—and, beneath an arch symbolizing the surface of the earth, Piotrowin rising from the grave. On the reverse, St. Wenceslaus, seated on a throne, raises two palm branches.
A beautiful piece with mint luster.
The second-highest grade for this type of coin, with only one coin graded higher.
A magnificent numismatic piece.