A man in equestrian dress stands beside a richly decorated piano, holding an open musical score in his hands. He wears a long reddish-brown coat over a white waistcoat dotted with gold, pale blue breeches, and black knee-high boots with spurs. His left leg is crossed over his right, and his body leans casually against the instrument, suggesting ease and confidence.

The score he presents is clearly inscribed with the name 'Haydn,' linking him to the world of music. His left hand supports the music while his right hand points to the page, as if drawing attention to its contents. His face is turned toward the viewer, with a calm and slightly inquisitive expression, framed by powdered hair that falls to his collar.

Behind him, the piano's case is adorned with geometric inlays in green and gold, and a black bicorne hat rests on its lid. The background is dark and plain, focusing all attention on the figure and his immediate surroundings. Light falls from the left, illuminating the sitter's face, the white of his waistcoat, and the open score, while casting softer shadows on his coat and the piano.

The floor beneath him is painted with broad, visible brushstrokes, suggesting a patterned carpet or rug. The overall palette is dominated by earthy reds, cool blues, and deep greens, punctuated by the bright whites and golds of his attire. The brushwork is smooth and controlled, especially in the rendering of fabric and skin, while the background and floor show broader, looser handling.

The composition is carefully balanced, with the upright figure offset by the horizontal lines of the piano and the diagonal of the open score. Small details, such as the gold pin at his throat and the shine on his boots, add to the sense of refinement and status.