Was This Scrap of Cloth Once a Tunic Worn by Alexander the Great?

Could it be a scrap of Alexander the Great’s clothing?

A fragile piece of purple-and-white fabric, frayed over more than two millenniums, that was found in one of a series of tombs in northern Greece decades ago is at the center of a new claim ruffling feathers in the country’s archaeological community.

The debate erupted this month after Antonis Bartsiokas, a paleoanthropologist at Democritus University of Thrace, published a paper arguing that one of the tombs, believed up to now to house the remains and treasures of Alexander’s father, actually held items belonging to Alexander the Great himself and his half brother. That included a purple chiton, or tunic.

The claim challenges the work of one Greece’s most renowned archaeologists, Manolis Andronicos, who led the discovery of the tomb in 1977. Mr. Andronicos, who died in 1992, had asserted that the tomb and artifacts belonged to the father, Philip II of Macedon, whose military victories united ancient Greece and laid the foundation for his son’s conquests from Egypt to India.

Mr. Bartsiokas, who specializes in the microanalysis of fossils, instead believes it was Alexander’s half brother, Arrhidaeus, or Philip III, who was buried in the tomb, along with some of Alexander’s possessions, including the chiton, a piece of purple cotton with a layer of white fabric in between.

If the new claim were confirmed, it could upend long-held beliefs about one of the most important burial sites in Greece. Some Greek archaeologists say, however, that the claim is without substance.

Mr. Bartsiokas said he used new technology and his interpretation of an ancient frieze found in the tomb to make his case.