ARCHEOLOGISTS and forensic experts believe they have identified the skeleton of Cleopatra’s younger sister, murdered more than 2,000 years ago on the orders of the Egyptian queen.

The remains of Princess Arsinöe, put to death in 41BC on the orders of Cleopatra and her Roman lover Mark Antony to eliminate her as a rival, are the first relics of the Ptolemaic dynasty to be identified.

The breakthrough, by an Austrian team, has provided pointers to Cleopatra’s true ethnicity. Scholars have long debated whether she was Greek or Macedonian like her ancestor the original Ptolemy, a Macedonian general who was made ruler of Egypt by Alexander the Great, or whether she was north African.

Evidence obtained by studying the dimensions of Arsinöe’s skull shows she had some of the characteristics of white Europeans, ancient Egyptians and black Africans, indicating that Cleopatra was probably of mixed race, too. They were daughters of Ptolemy XII by different wives.

The results vindicate the theories of Hilke Thür of the Austrian Academy of Sciences, who has long claimed that the skeleton was Arsinöe. She described the discovery of Arsinöe’s ethnicity as “a real sensation which leads to a new insight on Cleopatra’s family”.

Fellow experts are now convinced. Günther Hölbl, an authority on the Ptolemies, said the identification of the skeleton was “a great discovery”.

The forensic evidence was obtained by a team working under the auspices of the Austrian Archeological Institute, which is set to detail its findings at an anthropological convention in the United States later this month.

The story of the discovery will also be the subject of a tele-vision documentary, Cleopatra: Portrait of a Killer, to be shown on BBC1 at 9pm next Monday.

The institute’s breakthrough came about after it set out to examine Thür’s belief that an octagonal tomb in the remains of the Roman city of Ephesus contained the body of Arsinöe.

According to Roman texts the city, in what is now Turkey, is where Arsinöe was banished after being defeated in a power struggle against Cleopatra and her then lover, Julius Caesar.

Arsinöe was said to have been murdered after Cleopatra, now with Mark Antony following Caesar’s death, ordered the Roman general to have her younger sibling killed to prevent any future attempts on the Egyptian throne.

The distinctive tomb was first opened in 1926 by archeologists who found a sarcophagus inside containing a skeleton. They removed the skull, which was examined and measured; but it was lost in the upheaval of the second world war.

In the early 1990s Thür reentered the tomb and found the headless skeleton, which she believed to be of a young woman. Clues, such as the unusual octagonal shape of the tomb, which echoed that of the lighthouse of Alexandria with which Arsinöe was associated, convinced Thür the body was that of Cleopatra’s sister. Her theory was considered credible by many historians, and in an attempt to resolve the issue the Austrian Archeological Institute asked the Medical University of Vienna to appoint a specialist to examine the remains.

Fabian Kanz, an anthropologist, was sceptical when he began this task two years ago. “We tried to exclude her from being Arsinöe,” he said. “We used all the methods we have to find anything that can say, ‘Okay, this can’t be Arsinöe because of this and this’.”

After using carbon dating, which dated the skeleton from 200BC-20BC, Kanz, who had examined more than 500 other skeletons taken from the ruins of Ephesus, found Thür’s theory gained credibility.

He said he was certain the bones were female and placed the age of the woman at 15-18. Although Arsinöe’s date of birth is not known, she was certainly younger than Cleopatra, who was about 27 at the time of her sister’s demise.

The lack of any sign of illness or malnutrition also indicated a sudden death, said Kanz. Evidence of the skeleton’s north African ethnicity provided the final clue.

Caroline Wilkinson, a forensic anthropologist, reconstructed the missing skull based on measurements taken in the 1920s. Using computer technology it was possible to create a facial impression of what Arsinöe might have looked like.

“It has got this long head shape,” said Wilkinson. “That’s something you see quite frequently in ancient Egyptians and black Africans. It could suggest a mixture of ancestry.”

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