Today I bought this Kingdom of Hungary Silver Denar of Nikola III Zrinski (father of the Croatian national hero Nikola IV Zrinski (more commonly known as Nikola Šubić Zrinski)), minted in Kostajnica, Croatia in 1531:
https://en.wikipedia.org/wiki/Nikola_III_Zrinski
https://en.wikipedia.org/wiki/Nikola_IV_Zrinski
https://en.wikipedia.org/wiki/Hrvatska_Kostajnica