SuperRare

Girl with a Pearl Earring is an oil painting by Dutch Golden Age painter Johannes Vermeer. Going by various names over the centuries, it became known by its present title towards the end of the 20th century after the earring worn by the girl portrayed there. The work has been in the collection of the Mauritshuis in The Hague since 1902 and has been the subject of various literary and cinematic treatments.

Can someone explain me about this mother and what did she do that is very famous and here painting is very expensive??