Why do medina walls feel like memory?
The short answer
Every repair is visible. Each owner used a different plaster mix, a different colour, a different hand. Rain carves channels. Salt pushes plaster off in sheets. A single wall can show three generations of maintenance.
Tadelakt, pisé, and earth plaster erode, get patched, and re-erode visibly. The layer beneath is always a different era.
New construction in the medina looks wrong. Fresh plaster, sharp edges, uniform colour — the eye rejects it because every other surface carries the weight of use.