Investigators are seeking to confirm the identity of the owner of the painting and the person to whom it was being posted in the United States.
Lewandowska did not give further details.
According to the Polish news agency PAP, the painting shows a sunlit landscape in Cagnes-sur-Mer, southern France, with two women wearing red dresses and accompanied by a young girl.
It was not possible to obtain a photograph of the painting Friday.
Renoir (1841-1919) was one of the founders of the Impressionist style of painting in the 1870s, along with Claude Monet.
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Lewandowska did not give further details.
According to the Polish news agency PAP, the painting shows a sunlit landscape in Cagnes-sur-Mer, southern France, with two women wearing red dresses and accompanied by a young girl.
It was not possible to obtain a photograph of the painting Friday.
Renoir (1841-1919) was one of the founders of the Impressionist style of painting in the 1870s, along with Claude Monet.
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