Whitewashing over wall paintings has always been a common measure taken by those who wish to remove images from churches. Applying a coat of paint is cheaper and quicker than replastering the surface! Islamic iconoclasts at Hagia Sophia, Protestant Reformers in 16th-century England, and, it seems, Catholic iconoclasts of the 1970s all resorted to this method of obliterating sacred art to hide the beauty of the Church.