The cellar where Austria’s Josef Fritzl held his daughter for 24 years and fathered seven of her children is being filled with cement.

Josef Fritzl, the Austrian who fathered seven children with his own daughter in a homemade dungeon, has divorced his wife of 55 years — because she has never visited him in prison.

Josef Fritzl came face to face with the daughter he raped for 24 years at his trial, sources confirmed today.