PERGAMUM ACEOPOLIS: The most famous building in ancient Pergamon/Pergamum was its library. So many distinguished scholars gathered here that the Egyptian scholars in charge of the great library at Alexandria feared a "brain drain" and decreed a ban on papyrus exports to Pergamum. The scholars here devised a method of writing on animal skins that spread throughout Europe and became known as "parchment"--meaning "from Pergamum." Not much is left of the library today.