In Antoine Dominique Sauveur Aubert (born 1817), the Artist’s Uncle, Paul Cézanne presents a portrait of his uncle. The painting features a man with a serious expression, dressed in dark clothing. The background is a muted palette, allowing the figure to stand out prominently.

Cézanne's use of color is rich, with deep browns and greens that create a somber yet intimate atmosphere. The painting is executed in oil on canvas, a common medium for Cézanne. The approximate dimensions are 65 x 81 cm, making it a medium-sized portrait. Cézanne's brushwork is visible, with visible strokes that add texture to the surface.

The composition is balanced, with the figure centered against the understated background. Paul Cézanne painted this work around 1866, during a period when he was exploring portraiture. This painting is significant as it reflects his personal connection to the subject, being a family member. Cézanne's style was evolving, moving towards the Post-Impressionism for which he is now famous.

An interesting fact about this work is that it showcases his early exploration of form and color, which would later define his artistic legacy.