Pierre Auguste Renoir (1841-1919). Two color lithographs, including “”Bal du moulin de la Galette,”” and a portrait of a woman in purple with a flower in her hair. Bal du moulin de la Galette includes a certificate of authenticity.Bal du moulin de la Galette: unframed; height: 11 in x width: 13 in. Framed; height: 24 1/2 in x width: 26 1/2 in. Portrait: unframed; height: 13 in x width: 11 in. Framed; height: 26 1/2 in x width: 24 1/2 in.