| Portrait of Nicolaus Kratzer | |
| Artist: | Hans Holbein the Younger |
| Year: | 1528 |
| Medium: | tempera on oak |
| Height Metric: | 0.83 |
| Width Metric: | 0.67 |
| Dimensions Ref: | [1] |
| Museum: | Louvre |
| Accession: | 1343; MR 751 |
Portrait of Nicolaus Kratzer is a 1528 half-length portrait by Hans Holbein the Younger. It is now in the Louvre,[1] whilst a copy after it hangs in the National Portrait Gallery.[2] It shows the astronomer Nikolaus Kratzer, a friend of Thomas More and Holbein himself. In his hand he holds a half-finished polyhedral sundial, whilst on the shelves behind him are a semi-circular star quadrant, a shepherd's dial and other instruments.