[Translate to English:] Video
A depiction of Cupid originally incorporated on the rear wall as a “painting within the painting” was later painted over again. As a result of the latest investigations and the current restoration of the painting, it has now been proven that this overpainting was not done by Vermeer himself but was executed by a different hand some years after the completion of the Girl Reading a Letter. It has not yet been possible to identify the originator of this overpainting that completely covered the background picture, including its broad black frame, nor to determine at what point in time it was performed.