It is an oil on panel in oval format depicting an elderly woman with a small and sober millstone collar.

This painting came into the collection via the major gift of Rose-Marie and Eijk van Otterloo, after being on loan from them for an extended period of time.

She has a flat outstanding ruff; her hair is covered by a close-fitting cap with projecting side-flaps.

[3] Another copy was made presumably while the painting was in the British Coesvelt collection and has been in Felbrigg Hall since 1764, when it was recorded as a picture by Rembrandt of his mother.

[5] Aeltje Pietersdr Uylenburgh lived in the minister's residence of the Oude Kerk and was the daughter of Saskia van Uylenburgh's uncle Pieter, making them first cousins, though Aeltje was a generation older and probably served as a guide for the 21-year-old Saskia on her first visit to Amsterdam in the Spring of 1633.