Seireitei

The Seireitei (せいれいてい, Seireitei) is the location for the HQ for the 13 Court Guard Squads, and is in the center of the Soul Society.

Overview
Seireitei is a circular shiro with four main entrances, ten days walk apart, each guarded by one of the Gatekeepers. These gates are collectively called the Four Great Heaven Gates (四大天門, Yondaiten-mon): these gates are made up of the Northern Heaven Gate (北天国の門, Kita tengoku no mon), the Eastern Heaven Gate (イースター天国の門, Īsutā tengoku no mon), the Southern Red Hollow Gate (南天国の門, Minami tengoku no mon), and the Western Heaven Gate (西天国の門, Nishi tengoku no mon). Each of thes gates are guarded by the Heaven Guards (天国ガード, Tengoku gādo). It is said these gates are so hevay, it took all the strength of Tengoku to lift the Southern Heaven Gate during the Konton-led assault on thr Seireitei, and siege machines were needed to open the gates. But there are doors within the gates for Reapers to use to exit and enter the Seireitei.

The walls of the v are made of Tenkamiishi (天の神の石, "Stone of the God of Heaven"), a immensely rare and scaresd stone that is known to neglect all forms of energy (spiritual, magical etc).

Trivia/Notes

 * based on the Seireitei