Double portrait of a boy and girl, full-length, in a landscape

This 1645 double portrait of a boy and girl in a landscape represents one of Bol's early portrait commissions depicting children in the outdoor setting that allowed greater informality than studio interiors. Paired sibling portraits—brother and sister shown together or in matching individual canvases—were commissioned by prosperous Dutch families as records of family lineage and individual identity. The landscape setting, unusual for Dutch portraiture which typically preferred interior or neutral backgrounds, adds a note of aristocratic ease suggesting the family's aspirations toward the lifestyle of the landed gentry. The 1645 date places this work in Bol's early independent period.

The two children are rendered with careful attention to their youthful features and fine clothing, the landscape setting providing a natural backdrop painted with the warm tones characteristic of Bol's early Rembrandtesque style.