firstladies.org

J1aOv TIL two U.S. First Ladies remarried after the deaths of their President husbands. Frances Cleveland was 49 when she married Thomas Preston. She died 35 years later. Jackie Kennedy was 39 when she married Aristotle Onassis. He died 6 years later. Both are buried with their President husbands.
BKnx TIL that Andrew Jackson carried a locket with a picture of his deceased wife, Rachel Jackson, and propped it up in front of his bed every night so that she would be the last thing he saw when falling asleep and the first thing when he woke up.