John Constantine was created by writer Alan Moore, with contributions from Steve Bissette and John Totleben. The character first appeared in the comic book "Swamp Thing".
Constantine received his own comic book series titled "Hellblazer" published by DC Comics under its Vertigo imprint.
The character's iconic appearance, including his trench coat, blond hair, and cynical demeanor, was solidified during the early issues of "Hellblazer" by artist John Ridgeway and others.
John Constantine was portrayed by Keanu Reeves in the feature film "Constantine," which brought mainstream attention to the character outside of comics.
The character was portrayed by Matt Ryan in the NBC television series "Constantine," which aired for one season, increasing the character's visibility.
Matt Ryan reprised his role as John Constantine in various Arrowverse television series, expanding the character's presence in live-action media.
The character was integrated into the main DC Universe with a new ongoing series titled "Constantine: The Hellblazer" as part of the DC Rebirth initiative.
John Constantine is born in Liverpool, England.
Constantine trains under various occultists and learns to wield magic.
Young Constantine faces off against the demon Nergal, solidifying his role as a demon hunter.
John adopts the moniker 'Hellblazer' and becomes known as a cynical occult detective and magician.
Constantine opposes the First of the Fallen, a powerful demonic entity, preventing an apocalyptic event.
John teams up with the Swamp Thing, deepening his connection to supernatural forces and elemental powers.
Constantine makes a dark pact to save a life, highlighting the consequences of his moral ambiguity.
Constantine formally studies occult knowledge at Oxford to enhance his magical abilities.
John allies with occult kingpin Papa Midnite in a tense but necessary collaboration.
Constantine helps to thwart the invasion attempt by the demon Trigon.
Constantine intervenes in a mystical crisis threatening Earth, involving multiple supernatural factions.
Constantine journeys to Hell and confronts Lucifer Morningstar, negotiating for a soul's release.
Following traumatic events, Constantine suffers a mental collapse and temporarily loses his magical abilities.
John regains his magic and returns to fighting supernatural threats with renewed vigor.
Constantine plays a key role in stopping an apocalyptic occurrence known as the 'Rising Darkness'.
