If I remember correctly, in Attack on Titan, it's mentioned or implied a number of times that humans built the walls to protect themselves from the titans. (Feel free to correct me if I'm wrong on this.) If so then, how did they manage to get the walls erected (which seem to be the result of somewhat extensive work) without getting killed, if they were already under attack by that point?

(Note: I'm only about halfway through the anime series, so I might just be missing something that appears later.)

  • 10
    This is not explained in the anime, but in the manga. Beware spoilers.
    – anon
    Commented Feb 18, 2014 at 1:29
  • just the way humans built bridges and huge building in todays time :P Commented Feb 18, 2014 at 15:12
  • @hungerartist its just a joke, i obviously didn't mean it :S Commented Feb 19, 2014 at 3:11

6 Answers 6


Spoilers from the manga.

After the king's sanctum incident (ch50~65)

(when Rod Reiss tried to make Historia eat Eren),

it is disclosed that

The First King used his Coordinate power (control over titans) to force those titans to use their hardening power to shape up the walls, then used his Memory power to wipe the memories from the pre-wall era from humanity.

Why did he

leave hibernating titans inside the walls

is unknown.

he also created the Wallist Church to help him oversee the walls safety.

  • ^ This should be at the top. Commented Mar 13, 2015 at 11:24

If I remember correctly,

the walls were built with the hardening ability of Titans.

As a result, the walls are very tough to break and have sheltered human kinds for decades.

  • but titans evaporate and for those walls to happen they must have killed millions of titans..
    – Esqarrouth
    Commented Jan 7, 2015 at 14:47
  • 2
    @Esq actualy titan flesh from titans with the hardening power do not evaporate. Commented Mar 13, 2015 at 2:50

Just adding on the rest of the answers here, but

"the walls were built with the exoskeletons of titans"

seems to be somewhat different on the Shingeki no Kyojin Wikia:

The Wall Titans (幻の巨人 Maboroshi no Kyojin?, Phantom Titans) are unusual kind of Titans that make up the Walls that protect humanity. They are first revealed when the Female Titan tried to climb Wall Sina to escape from Eren and the Survey Corps. The lack of sunlight inside the Walls renders them immobile.

It is implied that the Wall Titans have the ability of using their crystallizing powers to create massive walls, notably Wall Maria, Rose and Sina. Their exact motives for doing this are unknown.

This seems to imply something completely different to what I was thinking. Of course you can't trust everything you read, but I like to think this information is pretty accurate.


The walls are built by a special breed of titans that the colossal titan is and this is discovered when a piece of the wall is broken off enter image description here

It is also stated here that a group of religious fanatics and the king know about the wall being made of titans.

Though the reason for the wall titans to protect humans is not stated it is possible that titan shifters made up the wall it is also possible that not all titans are against humanity considering the size of these titans they could have preyed on other titans thus providing a motive they wished to prey on titans and humans attract titans the humans might have trapped them and then the titans went into hibernation

  • What episode does this shot comes from? I don't quite recall that scene...
    – hc0re
    Commented Sep 3, 2015 at 16:20

The walls weren't exactly built by humans.

The walls are all made from 50 meter colossal titans. They are unable to move because it is dark inside the walls and they become immobile in the dark.

This is shown in the final episode of the anime after the credits.


Rod Reiss' ancestors, the first king, used his powers to create the walls (and Titans?) And wiped all memory of the word before the walls from the mind of humanity.

  • 5
    Welcome to Anime and Manga. could you provide a source to this (ie. manga/novel chapter no. urls to web pages)
    – Memor-X
    Commented Feb 20, 2015 at 1:38
  • This is disclosed on chapters sixty-something. Commented Mar 13, 2015 at 2:51

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