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What happened during the Void Century, and what was the Ancient Kingdom?Fiction

In-universe lore. Claims are judged against the fiction's own canon, not the real world.

The Void Century is the roughly 100 years of world history that the World Government forbids anyone from researching, the record of which survives only on the Poneglyphs. This ledger separates what the One Piece manga has confirmed about that erased century and the Ancient Kingdom from what it leaves genuinely open.

7 established, 2 disputed, 1 debunked, 3 unresolved. We do not pick an answer; the evidence places each claim. How we decide

28 citations from 2 independent sources - 26 echo the same voices and count once. Graded B2-D2.

Added 4 Jul 2026 - canon current as of 4 Jul 2026

What the four states mean
  • Establishedsupported, uncontested
  • Disputedcredible sources disagree
  • Debunkedrefuted by the evidence
  • Unresolvedno settled answer

Established 7supported, uncontested

  • The Void Century is a roughly 100-year period from 900 to 800 years before the current story that has no recorded archaeological history, and the World Government treats researching it as the worst crime possible; learning its events is said to reveal the 'true history' of the world.▰▰▱▱▱ likely2 points
    Supports
    • The Void Century, also known as the Void in History, is a century-long time period from 900 to 800 years prior to the current storyline with no recorded archaeological history. For unknown reasons, research into this era is considered to be the worst crime possible by the World Government.Void Century - One Piece Wiki primary
    • The events of this period are so important and relevant that by learning them, one is said to become aware of the "true history" of the Blue Planet.Void Century - One Piece Wiki analysis
  • The only surviving record of the Void Century is the Poneglyphs, indestructible stone steles inscribed with historical knowledge in an ancient script that, after centuries of World Government suppression, only a few people can still read: Nico Robin, the Kouzuki Family, and Vegapunk.▰▰▱▱▱ likely2 points
    Supports
    • The Poneglyphs are large, mysterious, and apparently indestructible steles inscribed with historical knowledge in an ancient script. They are scattered across many different islands on the Blue Planet.Poneglyph - One Piece Wiki primary
    • As the World Government has spent centuries violently suppressing it, in present day the Poneglyph language is lost to all but a few: Nico Robin, the sole surviving scholar of Ohara; members of the Kouzuki Family, the descendants of the Poneglyphs' creators; and Vegapunk, who deciphered it based on materials from Ohara.Poneglyph - One Piece Wiki analysis
  • A Great War during the Void Century ended with an alliance of twenty kingdoms, the First Twenty, destroying the Ancient Kingdom (the wiki's 'Great Kingdom'), and that victory let the alliance seize global control and found the World Government.▰▰▱▱▱ likely2 points
    Supports
    • The "Great Kingdom" was an ancient kingdom that was said to be vast, proud, and powerful. All mentions of it and its history have been erased, with even its name remaining a secret.Great Kingdom - One Piece Wiki primary
    • It was an enemy of the Twenty Kingdoms (which are now the World Government), as implied by Professor Clover, and was seemingly destroyed utterly by them over 800 years ago at the end of the Void Century. In fact, it seems its defeat allowed the Ancient Alliance to seize global control and establish the World Government.Great Kingdom - One Piece Wiki analysis
  • Reading Poneglyphs and researching the Void Century is effectively a capital crime, demonstrated when the World Government wiped out the scholars' island of Ohara with a Buster Call 22 years ago and branded the lone survivor, Nico Robin, a criminal simply for being able to read the stones.▰▰▱▱▱ likely3 points
    Supports
    • After the government discovered that the archaeologists were studying the forbidden Poneglyphs and the Void Century, they ordered the island's destruction via Buster Call.Ohara - One Piece Wiki primary
    • The only native survivor of Ohara was Nico Robin, who was branded a criminal for her ability to read Poneglyphs.Ohara - One Piece Wiki analysis
    • any knowledge of the true events of what happened in the Void Century is considered a death sentence, and holding such knowledge is liable to death in the eyes of the World Government, regardless of the affiliation of the person knowing it.Void Century - One Piece Wiki analysis
  • Professor Clover was shot dead on the Five Elders' orders at the climax of Ohara's destruction, just before he could speak the Ancient Kingdom's name, which he had called the key to understanding the Void Century.▰▰▱▱▱ likely2 points
    Supports
    • The name of the kingdom itself was said to be of tremendous importance and it was said by Clover that it was the key of understanding the Void Century. However, before Clover could say the kingdom's name, he was shot.Great Kingdom - One Piece Wiki primary
    • The "Great Kingdom" was first mentioned by Professor Clover amid the impending destruction of Ohara as he explained to the Five Elders that he knew why they are afraid of the events during the Void Century, as it would surely speak of this kingdom said to hold mighty power and ideals which, if discovered, posed a threat to the World Government.Great Kingdom - One Piece Wiki analysis
  • The complete true history is recoverable: the nine Historical Poneglyphs together form the Rio Poneglyph, the 'True Text of History', and Gol D. Roger reached the final island Laugh Tale and uncovered that truth, as Rayleigh confirms, which is why the sibling question onepiece-what-is-the-one-piece-treasure hinges on what he found there.▰▰▱▱▱ likely2 points
    Supports
    • The Rio Poneglyph is, according to Robin, the message carried by all the Historical Poneglyphs scattered around the world. It is rumored that after deciphering all of them, one will come to know the true history of the world (including everything about the Void Century and Ancient Weapons, whose research is forbidden).Poneglyph - One Piece Wiki analysis
    • Gol D. Roger seemed to have accomplished this task, according to Rayleigh.Poneglyph - One Piece Wiki primary
  • Joy Boy, a man of the Ancient Kingdom and the first pirate in history, was a chief opponent of the alliance in the Great War, and his defeat marked the end of the kingdom and thus of the Void Century, the fuller case for his identity being the sibling topic onepiece-joy-boy-identity.▰▰▱▱▱ likely2 points
    Supports
    • Joy Boy was a man from the Great Kingdom born 900 years ago at the start of the Void Century, as well as the first pirate in history. An extremely relevant figure in the Void Century, Joy Boy was a chief opponent of the alliance that would eventually become the World Government in the Great War.Joy Boy - One Piece Wiki primary
    • Joy Boy's defeat marked the end of the Great Kingdom and thus the Void Century.Void Century - One Piece Wiki analysis

Disputed 2credible sources disagree

  • Whether the Ancient Kingdom was the dangerous villain the World Government's propaganda paints, or a demonized civilization whose ideas were the real threat, is genuinely disputed: the government erased it as an enemy, yet the manga states the true danger is the kingdom's own ideals rather than any weapon.▰▰▰▱▱ roughly even chance1 against2 points
    Supports
    Against
    • despite the World Government declaring the Poneglyphs dangerous because of the weapons, the reality is that the ideals of the fallen Kingdom written on some of the stones are far more dangerous than any of the weapons.Poneglyph - One Piece Wiki analysis
  • The meaning of Joy Boy's Poneglyph apology is disputed: he left a message to Fish-Man Island and Poseidon apologizing for breaking a promise and vowing someone would fulfill it in the future, but what the promise was and why he could not keep it are read many ways, with the manga stating the reason itself is unknown.▰▰▰▱▱ roughly even chance1 against2 points
    Supports
    • One of those messages was to Fish-Man Island and to Poseidon, apologizing for breaking his promise and promising that someone would fulfill it in the future.Joy Boy - One Piece Wiki primary
    Against

Debunked 1refuted by the evidence

  • The common reading that the Void Century is forbidden chiefly because the Poneglyphs are keys to the world-ending Ancient Weapons is not what the manga ultimately supports: the weapons are the government's stated justification, but the story reveals the Ancient Kingdom's mere existence and ideas are the real reason research is banned.Refuted bythe ancient kingdom is the real reason the World Government has banned any Poneglyph deciphering and research, as the mere "existence and idea of this kingdom presents a threat to the World Government".refuted1 against3 points
    The claim rested on
    • In every case, the reason given is to protect against the revival of the Ancient Weapons, although the truth in this statement is questionable, to say the least.One Piece: The Void Century, Explained - Game Rant summary
    • the government then spread propaganda demonizing the citizens of Ohara, stating that they were attempting to use forbidden knowledge for global destruction. To this end, they used the fact that several Poneglyphs also contain information about the Ancient Weapons as justification and supposed proof of their claims.Ohara - One Piece Wiki analysis
    Refuted by
    • the ancient kingdom is the real reason the World Government has banned any Poneglyph deciphering and research, as the mere "existence and idea of this kingdom presents a threat to the World Government".Great Kingdom - One Piece Wiki analysis

Unresolved 3no settled answer

  • What actually happened in the Great War, its causes and its course, is left unresolved, and even how it ended geographically is only partly known, since Vegapunk deduces the Ancient Weapons' use raised sea levels worldwide by 200 meters and suspects the war has not truly ended.▰▰▱▱▱ likely2 points
    Supports
    • One of the most important events during the Void Century was the Great War. The reasons and circumstances for how this conflict came to be are currently unknown, but the war resulted in the formation of the World Government, the destruction of the Great Kingdom, and the current geographical state of the world.Void Century - One Piece Wiki analysis
    • Vegapunk deduced that the usage of the Ancient Weapons resulted in sea levels across the world rising by 200 meters. Because the Ancient Weapons still exist, Vegapunk believed this war had not yet fully come to an end.Void Century - One Piece Wiki primary
  • The Ancient Kingdom's name and the ideology behind it remain unresolved, deliberately withheld by the story: the kingdom's name is still a secret, and the very name Clover was about to speak, which he called the key to the Void Century, is the piece the Five Elders killed him to keep hidden.▰▰▱▱▱ likely2 points
    Supports
    • The Great Kingdom had a name, which is yet to be revealed. However, Clou D. Clover stated that its name was of tremendous importance and held the key of understanding the Void Century.Void Century - One Piece Wiki analysis
    • It is unknown why knowledge of this kingdom is a threat to the World Government. Professor Clover seemed certain that the history of the kingdom could answer to that and other pertinent questions.Great Kingdom - One Piece Wiki analysis
  • The true history the Poneglyphs record is still hidden from the reader, and its connection to the Will of D. is unresolved: no one who has learned it, from the Roger Pirates to Whitebeard to Oden, has revealed it, and Imu has only said the Will of D. has something to do with the Ancient Kingdom without explaining how.▰▰▱▱▱ likely2 points
    Supports
    • The Roger Pirates and Edward Newgate did not reveal to the public what lies hidden at Laugh Tale, and Kouzuki Oden did not reveal to his followers the true history because he considered it a burden.Void Century - One Piece Wiki analysis
    • According to Nerona Imu, the Will of D. has something to do with the Great Kingdom; however, the details are currently unknown.Great Kingdom - One Piece Wiki analysis

Spotted an error, or have a source to add? (tell us which claim). Missing a topic? .

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