According to the Jewish mysticism of the Kabala, the Zohar,
the seven halls of the world of Yetsirah, the divine halls into
which the seekers for the chariot (merkabah) strive to enter.
Here dwell the angels, presided over by the angel Metatron, as
well as the souls of men not especially noted for their piety.
(The souls of the pious dwell in the world of Beriah.)