Using a variety of testing techniques and historical reference works, the researchers found what they describe as evidence that the remains in Tomb I belong to Philip II, Alexander’s father. Those in Tomb II belong to Alexander’s half-brother Philip III, and the remains in Tomb II are those of Alexander IV, Alexander’s son, who died while still in his teens.

Perhaps most intriguing about the work, however, is the purple and white tunic found along with the remains in Tomb II

By testing via gas chromatography and Fourier-transform infrared spectroscopy, the researchers determined that the tunic was made of cotton and had been dyed using a purple color that was only allowed for the elite.

They note also that the tunic was featured in a frieze in Tomb II by a hunter identified as Alexander. Also, the tunic was found near a scepter, oak wreath and diadem, all made of gold, which are believed to have a possible link with ancient Persia, and by extension, to Alexander.

The research team was not able to explain why the tunic and other gold materials associated with Alexander the Great were left in the tomb, though they suspect it might have had something to do with Philip III being crowned king when Alexander died.