The exhibit is a re-creation of his mastaba which was originally located in Saqqara.
From the en.wikipedia.org
Inside the mastaba, a deep chamber was dug into the ground and lined with stone or bricks.
From the en.wikipedia.org
In front of each mastaba is a narrow shaft leading down to the burial chamber underneath.
From the en.wikipedia.org
The Theban Necropolis was later an important site for mortuary temples and mastaba tombs.
From the en.wikipedia.org
Ptahhotep's tomb is located in a mastaba in North Saqqara where he was laid to rest by himself.
From the en.wikipedia.org
The mastaba was built with a north-south orientation.
From the en.wikipedia.org
Its carriage house was designed to look like a mastaba.
From the en.wikipedia.org
Before Djoser, pharaohs were buried in mastaba tombs.
From the en.wikipedia.org
The most relevant precedent is found at Saqqara mastaba 3038.
From the en.wikipedia.org
More examples
An ancient Egyptian mud-brick tomb with a rectangular base and sloping sides and flat roof; "the Egyptian pyramids developed from the mastaba"
A wide stone bench built into the wall of a house, shop etc. in the Middle East; A rectangular structure with a flat top and slightly sloping sides, built during Ancient Egyptian times above tombs that were situated on flat land. ...
An Arabic word for bench, it has been applied to early tombs where the building above the ground was a rectangular structure with a flat roof, thereby resembling a bench.
The Egyptians didn't become great pyramid builders right away. They started by cutting tombs into the rock of the desert floor and building mastabas (from the Arab word meaning "bench") over them. Mastabas were raised, flat, platforms. ...
The Arabic word meaning; "bench". Used to describe tombs of the Early Dynastic Period and Old Kingdom. The basic form resembled a bench.
Goa'uld martial art in Stargate SG-1. The actors were in fact doing capoeira.
Ancient Egyptian tomb, in form a massive brick or stone mound with battered walls on a rectangular base. The sarcophagal chamber was deep underground below.
A flat-topped, one-story building with slanted walls. Invented by the ancient Egyptians to mark underground tombs.