Batman is a fictional character, a comic book superhero appearing in comic books published by DC Comics. Batman was created by artist Bob Kane and writer Bill Finger, and first appeared in Detective Comics #27 (May 1939). Originally referred to as "the Bat-Man" and still referred to at times as "the Batman," the character is additionally known as "the Caped Crusader," "the Dark Knight," and "the World's Greatest Detective," among other titles.
Batman's secret identity is Bruce Wayne, an American billionaire playboy, industrialist, and philanthropist. Having witnessed the murder of his parents as a child, he swore revenge on criminals, an oath tempered with the greater ideal of justice. Wayne trains himself both physically and intellectually and dons a bat-themed costume in order to fight crime. Batman operates in the fictional Gotham City, assisted by various supporting characters including his crime-fighting partner, Robin, his butler Alfred Pennyworth, the police commissioner Jim Gordon, and occasionally the heroine Batgirl. He fights an assortment of villains, often referred to as the "rogues gallery," which includes the Joker, the Penguin, the Riddler, Two-Face, Ra's al Ghul, Scarecrow, Poison Ivy, and Catwoman, among others. Unlike most superheroes, he does not possess any superpowers; he makes use of intellect, detective skills, science and technology, wealth, physical prowess, martial arts skills, an indomitable will, fear, and intimidation in his continuous war on crime.