The Girl Reading a Letter at an Open Window by Johannes Vermeer is one of the most famous works of seventeenth-century Dutch art. Preserved at the Gemaldegalerie Alte Meister in Dresden, the painting has been restored, in an elaborate process lasting from 2017 to 2021. The removal of a large section of overpainting dating from a later period has profoundly altered the work's appearance and revealed the original composition. To showcase the discovery,...