At the height of the gallery on the two narrow sides of the library are mounted two large reliefs. The relief on the south wall shows a popular motif from the Old Testament ‒ the ‘Judgement of Solomon’ as the epitome of human wisdom. Its pendant on the north wall shows a scene from the New Testament with the boy Jesus teaching in the temple, representing divine wisdom.
There are also large almost three-dimensional reliefs in the side chambers at the height of the galleries. These show a total of eight Biblical figures: on the south side are the prophets Moses and Elijah with the Apostles Peter and Paul facing them; on the north side are the four Evangelists: Matthew, Mark, Luke and John.
In the upper section of the central room are four personified virtues as female figures ‒ eternal truth (‘veritas eterna’), divine wisdom (‘sapientia divina’), sagacity (‘prudentia’) and knowledge (‘scientia’).