The movie, ‘Girl with the pearl earring’ is really good, not at all true but very beautifully done. You might watch that.
A few years ago I read a book with that title. I wonder if it was the same story. In the book it was a servant girl in the household where the artist was working or living. I wonder if the owner’s daughter would have been wearing such a plain headdress, so the idea of this being a servant girl made sense to me.