In Catherine Jagiellon with her son Sigismund in prison, the viewer sees a somber scene filled with dark colors. Catherine is depicted with a serious expression, holding her son close. The background is muted, emphasizing the emotional weight of the moment.

The figures are rendered with a realistic attention to detail, highlighting their clothing and expressions. The painting is executed in oil on canvas, showcasing the artist's skill in creating texture and depth. Simmler employs a realistic style, capturing the somber mood of the subjects. The dimensions are approximately 80 x 100 cm, making it a sizable portrait.

The use of light and shadow adds to the dramatic effect of the scene. Józef Simmler was a Polish painter known for his historical and portrait works. This painting reflects a significant moment in Polish history, as Catherine Jagiellon was a key figure in the Jagiellonian dynasty. An interesting fact about this work is that it captures the emotional bond between mother and son during a time of hardship.

Simmler's attention to historical detail adds depth to the narrative.