Fill in the Blanks 192-testOnline version 192-test by Farhad Key 1 disciplines a expertise core consists accessible The Gallery's Conservation Department performs one of the Gallery's functions , the long - term preservation of all Collection items , to make them now and in future . The Collection dates from the 8th century to the present day , and of portraits in variety of media , so the Gallery employs Conservators with in a range of , including Framing , Painting , Paper , Sculpture and Photography .