A 1885 portrait of Octave Maus by Belgian artist Théo van Rysselberghe, capturing the art critic in a dimly lit, atmospheric interior.

This portrait depicts Octave Maus, a central figure in the Belgian avant-garde art scene and a co-founder of the exhibition society Les XX. Painted in 1885, the work captures Maus in a domestic interior, standing near a mirror that reflects his silhouette. The composition relies on a subdued, tonal palette, characteristic of Van Rysselberghe's early period before his full adoption of pointillist techniques.

The artist employs a controlled application of paint, focusing on the interplay of artificial light sources within the room. The warm glow from the lamps contrasts with the dark, formal attire of the subject, creating a sense of quiet intimacy. The mirror reflection adds a layer of depth to the scene, suggesting a psychological dimension to the portrait. Van Rysselberghe avoids excessive detail, preferring to suggest form through light and shadow.

Octave Maus was a lawyer, art critic, and the secretary of Les XX, an organisation that provided a platform for artists such as James Ensor, Fernand Khnopff, and Georges Seurat. This portrait reflects the close professional and personal ties between the artist and his subject. The painting demonstrates Van Rysselberghe's ability to balance the requirements of traditional portraiture with the atmospheric concerns of the late nineteenth century. The setting, with its specific furniture and lighting, provides context to the life of a man who shaped the reception of modern art in Brussels. The work remains a record of the intellectual circles that defined the period, captured with a restrained and observant eye.