Once the statue was made a stone-house (the serdab) was provided for it above ground.
So that the function of the serdab was to afford a safe and final asylum to the statues.
serdab, ser′dab, n. a secret chamber within the masonry of an ancient Egyptian tomb in which images of the deceased were stored.
As the dolmen is a crude copy of the serdab it can be claimed as one of the ultimate results of the practice of mummification.
The interior of a mastaba is composed of three parts—the chamber, the serdab, and the well.