IOWA CITY — The University of Iowa is spending $1 million to remove from its campus buildings — including the 178-year-old Old Capitol and 93-year-old Field House — spray painted messages Black Lives Matter protesters left earlier this summer. But, in doing so, UI Libraries is promising to capture and preserve images of the graffiti “to ensure the messages are not forgotten and can help guide campus in its work to make meaningful changes,” according to the UI Office of Strategic Communication.