Płock_Diadem
The Płock Diadem (Polish: Diadem płocki) is a reliquary crown held in the city of Płock, in central Poland. It was created in the beginning of the 13th century[1] probably in Hungary and was brought to Poland in the Middle Ages. This filigree diadem is wrought of extremely pure gold and set with sapphires, rubies, almandines and pearls.[2][3]