Philip IV, Restored – Interactive Feature – NYTimes.com.
After technical studies and a yearlong restoration, curators and conservators at the Metropolitan Museum of Art now believe that a full-length portrait of Philip IV that has been in the Met’s collection since 1914 is by Velázquez and not his workshop. The attribution reverses a finding made in 1973 when museum officials downgraded this portrait, along with 299 other old master paintings, saying they were either by the artist’s workshop or a follower.
Reconsidered, a Met Velázquez Is Vindicated article by Carol Vogel