The phenomenon of the medieval royal election thing of Mora, on the outskirts of Uppsala in central Sweden, is an under-researched topic from an archaeological viewpoint. With the archaeological material in focus, the author reviews the current state of research and offers a new hypothesis about the development of Mora as a non-continuous thing site with three phases: in the 500s, 1300s and1400s. It connects to long debated questions such as where in Mora the actual thing was located, why Mora was chosen to host this important ceremonial act, and how the semi-mythical “Stone of Mora” is to be understood.