The Queen’s wreath found in the antechamber of the tomb of King Philip II of Macedon and associated with his wife, Queen Meda. gold, 80 leaves and 112 flowers surviving, circa 310 BC, 10.2'"diameter
A real crown: The Queen’s wreath – a gold myrtle wreath found in the antechamber of the tomb of King Philip II of Macedon
This is from an exhibition at the Ashmolean Museum at Oxford (until 29th of August, 2011): Heracles to Alexander The Great: Treasures From The Royal Capital of Macedon, A Hellenic Kingdom in the Age of Democracy and is a collaboration between the Asmolean and the Royal Tombs at Aegae.
There are no images on the Ashmolean site, but an amazing and extensive collection of photos and maps can be found here, posted by Elisabeth Carney.