'Diadem' in the Bible

You are to put the turban on his head and put the holy diadem on the turban.

They made a plate, the holy diadem, of pure gold and wrote on it an inscription, as on the engravings of a seal, "Holiness to the Lord."

Finally, he set the turban on his head and attached the gold plate, the holy diadem, to the front of the turban just as the Lord had commanded Moses.

At that time the Lord who commands armies will become a beautiful crown and a splendid diadem for the remnant of his people.

Then another sign appeared in heaven: a huge red dragon that had seven heads and ten horns, and on its heads were seven diadem crowns.

Then I saw a beast coming up out of the sea. It had ten horns and seven heads, and on its horns were ten diadem crowns, and on its heads a blasphemous name.

His eyes are like a fiery flame and there are many diadem crowns on his head. He has a name written that no one knows except himself.