A controversial painting, attributed by some to Leonardo da Vinci, is up for sale by an unidentified man, ARTnews magazine reported this week.

The painting, "La Belle Ferronniere," a portrait of a Renaissance woman, was the subject of a celebrated art trial in 1929 in which a dozen art experts testified it was a copy.

That trial ended in a split jury decision and an out-of-court settlement. More than half a century later, the painting's authenticity remains in dispute.

The painting is being offered for sale by Omaha lawyer Jack Chapman on behalf of an unidentified man who says he is its current owner.

The owner, who asked ARTnews not to release his name for reasons of "health and security," says he is convinced his painting is a Leonardo.

The man who claims to be "La Belle Ferronniere's" current owner says he is related to Andree Hahn Dupas, the painting's previous owner, and that he acquired the painting from Dupas around 1974. Dupas' daughter, Jacqueline, said her father still owns the picture.

ARTnews said that during the last few years the painting has been examined by several curators and scholars, most of whom would not comment on the painting's authenticity.