A memorial plaque of Primož Trubar
Under the leaseholder Herbard Auersperg of Turjak, the castle became a stronghold of Protestantism and, in 1561, it was visited by the leader of the Slovenian Protestant movement, Primož Trubar, the author of the first two books written in Slovene, Katekizem, or Catechismus, and Abecedarij, Abecedary.
In October 2020, a memorial plaque in honour of Trubar's visit to the castle was unveiled on the lower courtyard, near the entrance to the printing works.