A man stands alone, facing forward, his body turned slightly to the viewer’s left while his gaze meets the observer directly. He wears a dark, formal outfit with a high white collar and voluminous sleeves, the fabric rendered in deep, nearly black tones that absorb the light, contrasting sharply with the pale skin of his face and hands. The sitter’s face is framed by carefully styled hair and a distinctive mustache, his expression calm and composed, with a faint suggestion of a smile.

Behind him, a heavy red drapery sweeps across the upper left and center of the background, its deep folds painted with broad, textured brushstrokes that catch the light in places, adding depth and richness to the scene. To the right, the curtain parts to reveal a stone balustrade and an opening onto a cloudy sky, the architectural elements painted in muted ochres and greys, suggesting an exterior setting beyond the interior space. A chair covered in red fabric sits behind the figure, its seat just visible beneath the drapery of his cloak, anchoring him within the composition.

The light falls from the left, illuminating the sitter’s face, collar, and hands, and casting the rest of his costume into shadow, emphasizing the contrast between the luminous flesh and the darkness of his clothing. The brushwork is smooth and controlled in the rendering of the face and hands, while broader, looser strokes define the drapery and background, creating a sense of depth and atmosphere. The overall color scheme is dominated by blacks, deep reds, and warm earth tones, punctuated by the pale highlights of skin and linen. This is a portrait of Philip IV of Spain, identified by the title and the regal bearing of the sitter.

The setting, with its grand drapery and glimpse of architecture, enhances the formality of the portrait and situates the king within a space befitting his status.