Possible identity of "Mona Lisa of the North" has been revealed by a British art historian.A mysterious girl with a pearl earring from Johannes Vermeer's famous painting was likely the daughter of the painter's commissioner, a historian has revealed. The 17th-century Dutch painter Vermeer worked almost exclusively for Pieter van Ruijven and Maria de Knuijt, a Dutch husband and wife in Delft. This has been revealed by Andrew Graham-Dixon, the art historian and TV presenter, claiming the girl wearing the pearl earring in the renowned oil painting is likely the couple's daughter, Magdalene. The wealthy family were members of a...