The rise of the concept of accuracy and provable (absolute) truth In the sixteenth century, 'conservation' was an inherently subjective discipline, cleaning and restoring the great and beautiful works of art of the past. Conservators responded to objects purely as aesthetic entities. Through the growth of scholarship in the seventeenth, eighteenth and nineteenth centuries, restoration work became more sophisticated leading to the 'in the style of restoration of the nineteenth century. The development of the concept of certainty and physical proof, aided by the developments in technology, social justice and education, had by the late twentieth century created a public expectation for truth and accuracy in all things. The expectation of increasingly truthful restoration work is shown by the re-restoration of the Sutton Hoo Helmet and Holbein's The Ambassadors.