In Portrait of Jakub Simmler, artist’s father, the artist captures his father with a warm and inviting expression. The color palette is rich, featuring earthy tones that add depth to the figure. Jakub is depicted seated, dressed in traditional attire, which reflects his status and character.

The background is subtly rendered, allowing the viewer to focus on the subject's face and demeanor. The painting is executed in oil on canvas, a medium that allows for detailed textures and vibrant colors. The brushwork is precise, emphasizing the facial features and the folds of the clothing. The dimensions are approximately 60 x 80 cm, making it a medium-sized portrait.

The realistic style showcases the artist's skill in capturing likeness and personality. Józef Simmler, the artist, was known for his portraits that often depicted family members and friends. This particular work is significant as it represents a personal connection between the artist and his father. Interestingly, it reflects the cultural context of 19th-century Poland, where family ties were highly valued.

The painting not only serves as a portrait but also as a historical document of familial relationships during that era.