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Arc Almanac

21 Oct 2026Draft. Not yet checked against the books.

All series / A Certain Magical Index / Arc 29

Arc 29 of 66 in A Certain Magical Index

Arc 29: Document of Constantine

In the story: 7–8 Oct

Arc name chosen by Arc Almanac, because the books don’t name it.

I’ve watched through

Index I stops before this arc.

Railgun stops before this arc.

Index II stops before this arc.

The Miracle of Endymion stops before this arc.

Railgun S stops before this arc.

Seen by the end of Index III.

Accelerator stops before this arc.

Earlier in story order than the end of Railgun T.

Item (episodes 1–2; airing) stops before this arc.

What happens

Protests against Academy City spread as tensions with the Roman Catholic Church grow. Touma travels to France with Tsuchimikado to investigate the artifact influencing the unrest and the member of God's Right Seat using it.

Where it sits

Document of Constantine in A Certain Magical Index
FormatVolumesUnitsLanguage
Light novel — A Certain Magical IndexVol 14Prologue–epilogueJapanese
Light novel — A Certain Magical IndexVol 14Prologue–epilogueEnglish
Manga — A Certain Magical IndexVol 21, 22Chapters 123–132Japanese
Manga — A Certain Magical IndexVol 21, 22Chapters 123–132English
Anime — A Certain Magical IndexIndex IIISeason 3, episodes 1–3—

Draft. Not yet checked against the books. Report a wrong mapping.