Maria Sèthe at the Harmonium is an oil-on-canvas painting by the Belgian neo-impressionist painter Théo van Rysselberghe.

[2][3] The subject of the portrait is Maria Sèthe, who later married the modernist architect, painter, designer and exponent of Art Nouveau Henry Van de Velde.

[2] The Pointillists used a technique in which small, distinct dots of primary color are applied in patterns to form an image.

He did not adopt Seurat’s style and simplification, but instead painted realistically with close attention to volume, light and shadow.

Equally attractive is the blonde hair realized in yellow and orange, complementary colours of purple and blue.