In Study of an Apostle, Anthony van Dyck presents a figure draped in rich, dark fabrics, embodying a solemn expression. The colors are deep and warm, with browns, reds, and golds dominating the palette. The background is dark, which helps to highlight the figure in the foreground.

The apostle's gaze is directed slightly off to the side, suggesting contemplation or prayer. The painting is executed in oil on canvas, a common medium for van Dyck's portraits. The artist's brushwork is visible, with fine details in the fabric and the apostle's facial features. The use of light and shadow creates a three-dimensional effect, enhancing the realism of the figure.

The dimensions are approximately 60 x 80 cm, making it a medium-sized work. Anthony van Dyck was a prominent Flemish Baroque painter known for his portraits and religious works. This study likely served as a preparatory piece for a larger composition or altarpiece. Van Dyck's ability to convey emotion and personality in his subjects is evident in this work.

An interesting fact is that he was influenced by the works of Titian and Caravaggio, which is reflected in his use of color and light.