Nearly the entire height of the vertical rectangular composition is taken up by a bust of a middle-aged man with a long moustache dressed in knightly armour. The man is turned in profile to the left. With his right hand, he holds a spear resting on his shoulder. The knight's face radiates seriousness, focus, and readiness for battle. Calmly and confidently, he gazes into the distance. The background is neutral, in a dark olive colour. The painting is done in a realistic style and is characterised by the artist's attention to historical details and attributes. The helmet on the man's head, known as a "Lobster-tailed pot helmet" (pappenheimer), is a type of open helmet, specifically a zischägge, which was particularly popular among Polish cavalry units in the late 17th to the first half of the 18th century. It was named after the Field Marshal of the Holy Roman Empire, Gottfried Pappenheim (1594–1632). Marceli Harasimowicz's work echoes Jan Matejko's painting "Portrait of a Man in a Helmet" (1859).