Their librarian was Wenceslas Brezan, who has left a valuable work on the annals of the Rosenberg family.
In 1356 Louvain was the scene of the famous Joyeuse Entree of Wenceslas which represented the principal charter of Brabant.
In 1356 Duke Wenceslas confirmed this charter and also the Golden Bull of the emperor Charles IV.
In 1357 Wenceslas, ordered a new wall embracing a greater area than the earlier one to be constructed round Brussels, and this was practically intact until after the Belgian revolution in 1830-1831.
The war of succession lasted till 1379, and ended in William's favour, the emperor Wenceslas (Wenzel) recognizing him as duke four years later.