In Portrait of Marten Looten, we see a man dressed in rich, dark clothing, indicative of his status. The background is a muted tone, allowing the figure to stand out prominently. Rembrandt uses warm colors to create depth and a sense of intimacy.

The light falls softly on Looten's face, highlighting his thoughtful expression. This painting is executed in oil on canvas, a common medium for Rembrandt. The dimensions are approximately 80 x 100 cm, making it a sizable portrait. The brushwork is characteristic of the Dutch Golden Age, with attention to detail in the fabric and facial features.

The use of chiaroscuro enhances the three-dimensional quality of the figure. Rembrandt van Rijn painted this portrait around c. 1665, during a period of great artistic achievement. Marten Looten was a prominent figure in Amsterdam, and his portrait reflects the artist's ability to capture personality.

An interesting fact is that this work showcases Rembrandt's innovative use of light and shadow, which became a hallmark of his style. The painting is currently housed in the Rijksmuseum in Amsterdam.