Library of Decease

Said to be the last place on Earth, the Library of Decease lies in the farthest point on Earth. The Library of Decease is located behind Dante's Gate, located just outside of Hoshigakure. It is only rumored but apparently, it contains knowledge from all four corners of the Earth. Even secrets of the Hidden Villages are stored in there. It existed since before Kaguya's time.

History
Not much is known about this strange and mysterious library but what is known is that it has been around since before Kaguya's time. Kaguya was the first to discover Dante's Gate and its mysterious library but even she was unable to enter. The Gate disappeared during Kaguya's fight with her sons and reappeared after she was successfully sealed in the Six Paths — Chibaku Tensei. Hagoromo himself entered Dante's Gate but was nearly trapped in there. He forbid any entrance into Dante's Gate. But during the periods after, many people have tried and failed to explore the library hidden behind the Gate.

Recent History
It was not until Sumaru discovered Dante's Gate and realized that he could safely enter and leave that research was continued on the library. More Info Soon