The figures in the image resemble the depiction of the "Princes in the Tower," Edward V and his younger brother Richard of Shrewsbury, Duke of York. They are often portrayed together in historical art due to their tragic and mysterious disappearance in 1483. Their uncle, Richard III, is widely believed to have had a role in their disappearance after he declared them illegitimate and took the throne.
These illustrations are commonly found in historical museums, especially in places connected to the Plantagenet or Tudor history, like the Tower of London. If the image was taken in a location associated with British royal history, this identification is likely correct.