The Central 46 Chambers Compound (中央地下議事堂, Chūō Shijūroku Shitsu; lit. "Central Underground Parliament") Building is a highly restricted area in the Seireitei in Soul Society that serves as the headquarters of the Central 46.

Most of the building is underground, with only a small portion visible from the surface. It houses the Central 46, the central government of Soul Society. The Central 46 rules Soul Society on behalf of the Soul King. They make all of Soul Society's laws and try those who are charged with breaking them, whether the crime was committed in Soul Society or in the Human World.

The Underground Assembly Hall is where the Central 46 meets. It is an octagonal structure located in a large open space within the main building, and was also referred to as the Diet Building. Beyond the entrance to this structure there is a staircase leading down into the hall. The benches and high-backed chairs of the 40 wise men are arranged in two concentric rings, one higher than the other, surrounding an open area. In the walls there are recesses with stairs leading up to them, where the six judges are seated. There are large banners on its walls. It has thirteen levels of protection to keep out or at least stall intruders.
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The Seijōtōkyorin (清浄塔居林, Tranquil Forest of Residential Towers; Pure Pagoda Forest) is where the Central 46's members reside. It is the only place in all of Seireitei that is completely off limits to all except the Central 46, no matter what reason they may have. The residences are tall, thin tower-like buildings with the entrance raised off of the ground and accessed via a short stairway, with a wooden walkway surrounding the building. There is a tall, narrow window in the wall starting just above the door that continues to the top of the tower. Little of the interior is seen beyond the entrance, with no furnishings visible. It is unknown if there is only one floor, or if there are multiple levels inside the towers. It is not revealed if there is a difference between the residences of the wise men and the judges.
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Also known as the Daireishokairō (大霊書回廊, Great Spirit Book Gallery) is a repository of all the knowledge and history of the Soul Society. This is another area to which access is restricted. As a result, few are familiar with its inner workings even among the captains.
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