"Jane" carved into the wall of a room in the Beauchamp Tower in the Tower of London. It is believed (no absolute proof available) that it was carved by Guildford Dudley, husband of Lady Jane Grey. They were both executed (along with a number of other people) for trying to put Jane on the throne. I find this quite poignant -- in prison, awaiting execution, this young man chose to commemorate his wife, not himself. Evidence of true love?