Portrait of a Lady, possibly Madame Van Cleef 

This portrait by French artist Paul César Helleu (1859-1927) depicts a woman in a dark dress and hat, resting her chin on her hand. Helleu was known for his elegant and delicate style of portraiture, often depicting fashionable women of the Belle Époque. The work showcases Helleu’s mastery of charcoal and pastel, creating a sense of fluidity and movement in the lines and subtle shading of the woman's form. The background features subtle curved lines, suggesting a sense of atmosphere and depth.