THE COLLECTION OF ARMS at Ptuj Castle is of national importance, as it comprises more than 500 pieces of various cold weapons, firearms, hunting and sporting weapons, and protective equipment dating from the 15th to the 20th centuries. Most of the exhibited items come from the nearby Vurberk Castle, while some pieces were collected by members of the Ptuj Museum Society.

TOMBSTONE OF FRIEDRICH IX, LORD OF PTUJ
The tombstone with a relief depiction of Knight Friedrich IX, born around 1403 and died in 1438, once stood above the tomb of the Lords of Ptuj in the church of the Dominican Monastery in Ptuj.
Friedrich IX of Ptuj was the last male heir of the Lords of Ptuj, a noble family which established itself in the early 12th century in the service of the archbishops of Salzburg, and at the time of Friedrich IX was second only to the Counts of Celje in power, influence, and importance in Styria.
During their three hundred years of residence in Ptuj, the Lords of Ptuj had a decisive influence on the appearance of the town and its surroundings with the foundation of the Dominican and Minorite monasteries and the building of the pilgrimage church at Ptujska Gora.