The legend of the Batman started in Detective Comics #27. It was then that the remarkable young Bruce Wayne, heir to the Wayne fortune, saw his parents gunned down by a mugger. The experience changed Bruce forever, and when he was grown he began leading a double-life. By day he was an idle playboy, but by night he patrolled Gotham City as Batman, a caped crusader who took on the aspect of a bat in order to frighten criminals.
In the more than fifty years that followed, Detective Comics has been the flagship title of DC’s comic line. Indeed, it’s from this title that DC (formerly National Periodical Publications) derived its name.