In Portrait of a Man Holding a Black Hat, we see a man dressed in dark clothing, holding a black hat in his right hand. The background is dark, which enhances the figure's presence. The use of light and shadow creates depth and draws attention to the man's face.

His expression is serious, suggesting contemplation or introspection. The painting is executed in oil on panel, a common medium for Rembrandt during this period. The artist's technique involves a rich application of paint, giving a textured appearance to the surface. The contrast between light and dark, known as chiaroscuro, is prominent, emphasizing the three-dimensionality of the figure.

This technique is a hallmark of Rembrandt's style, showcasing his mastery of light. Rembrandt van Rijn was a leading figure in the Dutch Golden Age, known for his innovative approach to portraiture. This particular work is notable for its psychological depth, as the subject's expression invites viewers to ponder his thoughts. Interestingly, this painting is part of a larger tradition in Rembrandt's oeuvre, where he often explored the human condition through his subjects.

The work exemplifies his ability to convey emotion and character through subtle details.