In Justice League #50, Batman discovered one of the Joker's darkest secrets. As he sat in the Mobius Chair, which can answer any question, Batman inquired, "what is the identity of the Joker?" To everyone's surprise, the answer was that the Joker had three different personalities. The most widely held belief among fans is that these three actors played the Joker during the Golden (Jack Nicholson), Silver (Caesar Romero), and Bronze (Heath Ledger) eras of comic book history.