The imprint publishes hundreds of classics from the Greeks and Romans to Victorian Literature to modern classics. For nearly twenty years, variously coloured borders to the front and back covers indicated the original language. The second period of design meant largely black covers with a colour illustration on the front. In 2002, Penguin announced it was redesigning its entire catalogue, merging the original Classics list (known in the trade as "Black Classics") with what had been the old Penguin Twentieth-Century Classics list, though the silver covers for the latter have so far been retained for most of the titles. Previously this line had been called 'Penguin Modern Classics' with a pale green livery.