In Study of a sleeping dog for the “Portrait of Prince Golitsyn”, we see a relaxed dog lying down, its fur rendered in soft browns and whites. The background is simple, allowing the viewer to focus on the dog’s peaceful expression. The light falls gently on the dog, highlighting the textures of its fur.

This intimate portrayal captures a moment of tranquility in the animal's life. The painting is executed in oil on canvas, showcasing Jan Ciągliński's skill in capturing the subtleties of light and shadow. The brushwork is delicate, with fine details that bring the dog's fur to life. The composition is straightforward, emphasizing the subject without distractions.

This study serves as a preparatory work for a larger portrait, indicating its significance in Ciągliński's oeuvre. Jan Ciągliński was known for his ability to depict animals with realism and affection. This particular study was created as a preparatory piece for the Portrait of Prince Golitsyn, showcasing the artist's attention to detail. An interesting fact about this work is that it reflects the artist's deep appreciation for the natural world and the creatures within it.

Ciągliński's works often highlight the bond between humans and animals, making this study a notable example of his thematic focus.