A precise 1436 portrait of the goldsmith Jan de Leeuw by the Flemish master Jan van Eyck, noted for its technical detail and psychological clarity.

This portrait depicts Jan de Leeuw, a goldsmith from Bruges, captured by Jan van Eyck in 1436. The subject is shown in a three-quarter view against a dark, neutral background, which draws focus to the precision of his features. Van Eyck employs his characteristic mastery of oil paint to render the textures of the sitter's clothing, specifically the fur-lined garment that frames his face. The lighting is subtle, modelling the contours of the face with care and revealing the individual character of the subject.

Jan de Leeuw holds a small gold ring between his thumb and forefinger. This detail serves as a reference to his profession as a goldsmith. The painting is notable for its small scale, a common format for private portraits of the period. The original frame, which remains with the work, contains an inscription in the local dialect that identifies the sitter and the artist. The inscription also includes a pun on the sitter's surname, de Leeuw, meaning the lion.

Van Eyck was a pioneer in the use of oil as a medium, allowing for the layering of glazes to achieve depth and luminosity. This work demonstrates his ability to capture a likeness with clinical observation. The skin tones are rendered with fine brushwork, showing the subtle variations in colour that define the subject's age and expression. The gaze of the sitter is directed towards the viewer, creating a sense of direct engagement. This portrait remains a clear example of the technical standards achieved in the Burgundian Netherlands during the fifteenth century. It provides a window into the social and professional life of the period, documenting the status of a skilled craftsman through the lens of one of the most capable painters of the era.