Floor plan of the Mastaba of Mereruka in Saqqara, Egypt. Designed and drawn in comparison of different existing plans and descriptions.
Explanations:

Entry from the south side (arrow)
A1–A21, beige shading: rooms for Mereruka himself
B1–B6, green shading: rooms for Mereruka’s wife Watet-khet-hor
C1–C6, red shading: rooms for Mereruka’s son Meryteti, later occupied by the older son Pepyankh, then dedicated to Meryteti again (see the Osirisnet description)
D, light grey shaded: remains of a temenos wall with a offering place for Khenu, another son of Mereruka
AT, BT, CT, red outline: outlines of the burial chambers below the mastaba for Mereruka himself (AT), his wife (BT) and his son (CT), accessible through the access shafts from room A11 (for AT) resp. from the roof of the mastaba (for BT via shaft B6, for CT via shaft C6).Dotted lines with ordinary color shading: passages that were cut through the walls later but still during the time of the building of the mastaba (A1 to A2, A9 to A16)
Dotted lines with light grey shading: passages that were cut through the walls far after the completion of the mastaba and closed again today (A3 to A10, A9 to A17).Some hints:

The numbering of the rooms varies a bit from book to book; therefore we use the original numbering from the 1893 excavations that are the common base of the differing modern room number systems. In spite of some little oddities (A17 and A18 are just one room together) this original numbering is still the most useful for practical reasons. The numbers C6, D and AT, BT, CT were added by myself.
The doors and passages are, as traditional in floor plans, intentionally separated with thin lines from the rooms they link, because their lintel and in some cases also their threshold is lower resp. higher than the ceiling resp. the floor of the rooms. If you don’t like these lines please make a copy of this drawing and remove them in the copy only.
Own work
Aristeas (Roman Eisele)