A portrait by Gustav Klimt could be put up for sale, potentially fetching over $30 million, to resolve a dispute between a Viennese art foundation and the granddaughter of the woman in the painting, a lawyer for the granddaughter said on Thursday.

Klimt, an Austrian symbolist, painted the portrait of Gertrud Loew in 1902 and it belonged to her at least until 1938, a year before she fled Austria to escape the Nazis.

Her U.S.-based granddaughter, Andrea Felsovanyi, has been contesting ownership with the private Klimt Foundation, which currently holds the work.