Domogravis, the arcology and Fractalopolis the living city.
In some places there is a belife about even the artificial tools, and also the own building themself, can be "impregnated" by the souls of the sentient beings who use them, and maybe they can "awake". These spirits are very respected by the inhabitants, and they seem to acquire the personality of people who die there the first time, who lived more time, or the children who grew up there.
But if those building are destroyed... what would be the fate of those spirits in the afterlife? Could magic be used for "reincarnation". The demiplane of the domogravis is the answer.
Althought the landscape is really bizarre and surealist for the newcomers really the visitors are wellcome here and it is very friendly for the traders, if you don't mind to pay the toll taxes.
The faster way to describe Domogravis is "surrealist fractal architecture", but this needs be explained better. The plane is a heap of floating stone spheres in the space, linked by roads as if these were rope bridges. The core of each sphere would be a town or city, full with collumns, the streets, and ramified on these the buildings. Each building spirit can use a humanoid-shape avatar to communitate with visitors. They remember the lifes of their previous inhabitants, and their statements are very valious for archaeological investigations. The fact is the most of these spirits would wish a "second life", and these is possible, but not in the usual way.
When a home spirit allows new inhabitants and after a time, before if certain magic is used, the "home" is reborn, but in a different demiplane, Fractalopolis. now with a potential future for interplanar trade. The fact is lots of areas started as camps for refugees. You could guess living in this city can be very expensive, or complicate, but some things can be explained. Technically each building is a sentient being for all llegal effects, and then the buying and selling would be equivalent to slavery. Hiring is legal, but the permanent residence is more like to marry the right person.
Although it needs some effort for each home spirit, each building can create a zone for urban garden. However not everybody wants to live within a sentient building because it is like somebody always watching you and there isn't enough feeling of intimancy.