The mastaba of Nefermaat and Atet was built in three/four major phases.
The several phases are especially clear at the chapel of Nefermaat

the core chapel with the decorated walls
the whole mastaba was greatly enlarged
|
the mastaba was enlarged for
a second time, blocking access to the decorated chapel; as a result,
a new chapel was build
|
a mud brick chapel was build in front of the mastaba
the reconstruction follows mainly: El-Khouli 1991: pl. 13
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