聖イシュトヴァーンの王冠
The group were unearthed in 1860 by a farmer in what is now called Ivanka pri Nitre in Slovakia, then Nyitraivánka in Hungary. If it is a crown, it is, with the Holy Crown of Hungary of a few decades later (also in Budapest) and the kamelaukion of Constance of Aragon, one of only three surviving Byzantine crowns.