A 1992 comic, aptly titled "The Death of Superman", features the superhero engaging in a battle with the deadly machine Doomsday and eventually succumbing to life-threatening injuries.
In subsequent comics, a host of famed superheroes mourned Superman's passing including Green Arrow, Green Lantern, Batman, Wonder Woman and Supergirl.
In the months following his death, Superman's body was stolen from its tomb. As a result, a host of impostors, including The Man of Tomorrow and The Last Son of Krypton, took on the form of Superman, claiming to be the superhero brought back to life.
The death of Superman was short-lived. In the 1993 "Reign of the Supermen" series, Superman was brought back to life when it was discovered that he was not dead but rather stuck in suspended animation.
Unfortunately the reborn Superman lacked his usual powers. However, following a battle with the villainous Cyborg and a deadly amount of Kryptonite, as well as the selfless sacrifice of his friend the Eradicator, Superman's powers were restored.