François van Aerssen (1572-1641), heer van Sommelsdijk, de Plaat en Spijk. Diplomaat in dienst van de Verenigde Nederlanden

Mierevelt employs the restrained, realistic approach typical of early‑17th‑century Dutch portraiture. The sitter is rendered in dark clothing with a crisp white ruff, while a black cloak falls over his left shoulder. Light falls softly on his face, and the modest brown wall background is punctuated by a red‑hued tablecloth or rug at the base.

Created in the later stage of Mierevelt’s career, the painting remained in private hands before entering the Rijksmuseum’s holdings, where it is displayed as an example of diplomatic portraiture from the period.

The portrait reflects the broader cultural flourishing of the Dutch Golden Age, when portraiture served both as a record of individual achievement and as a visual affirmation of civic and aristocratic identity within the Republic.