Analysis of information sources in references of the Wikipedia article "Domus de Janas" in English language version.
Private tombs of the Third Dynasty [c. 2686 BC–2613 BC] broadly followed the pattern of those of the Second, in being brick mastabas. However, there were significant developments in the form of the offering place at the southern end of the eastern facade, which was in some cases lined with stone and projected into the heart of the mastaba. These linings could be decorated, while a niche at the northern end of the tomb might be dedicated to the cult of the wife of the tomb owner. The southern niche and its slab-stela evolved during the Third Dynasty into what by the following dynasty had become the classic false door.
Private tombs of the Third Dynasty [c. 2686 BC–2613 BC] broadly followed the pattern of those of the Second, in being brick mastabas. However, there were significant developments in the form of the offering place at the southern end of the eastern facade, which was in some cases lined with stone and projected into the heart of the mastaba. These linings could be decorated, while a niche at the northern end of the tomb might be dedicated to the cult of the wife of the tomb owner. The southern niche and its slab-stela evolved during the Third Dynasty into what by the following dynasty had become the classic false door.
