The sketch features Catherine Jagiellon, elegantly dressed, alongside her son Sigismund and John, Grand Duke of Finland. The figures are depicted in a close grouping, suggesting intimacy and familial bonds. The color palette is muted, with soft earth tones dominating the scene.

The background is minimal, focusing the viewer's attention on the subjects in the foreground. This work is created in ink on paper, showcasing Simmler's skill in capturing likenesses and expressions. The lines are delicate yet confident, revealing the artist's command over his medium. The sketch serves as a preparatory study for a larger painting, indicating its importance in Simmler's oeuvre.

The approximate dimensions suggest it is a small-scale work, typical for sketches. Józef Simmler was a Polish artist known for his portraits and historical scenes. This sketch is particularly interesting as it relates to a larger painting titled ‘Catherine Jagiellon in Gripsholm Prison’. It reflects the artist's focus on royal subjects and the historical context of the Jagiellon dynasty.

Simmler's work often highlights the emotional depth of his subjects, making this sketch a significant piece in understanding his artistic approach.