Portrait of Nicholas Kratzer

Holbein's Portrait of Nicholas Kratzer (1528) at the Louvre depicts the Bavarian astronomer and astronomer royal to Henry VIII — a humanist scholar who had arrived at the English court through Erasmus's network of intellectual connections. Kratzer is shown with the instruments of his profession — a polyhedral sundial, dividers, and other mathematical tools — in a portrait that combines the documentation of scientific practice with the characterization of a specific personality. Holbein knew Kratzer personally through the same humanist networks that had brought him to England, and the portrait has the quality of an image made between friends who shared intellectual interests: precise, warm, and mutually respectful.

The extraordinary rendering of the astronomical instruments demonstrates Holbein's ability to paint objects with scientific precision, while Kratzer's absorbed concentration conveys genuine intellectual engagement.