The Mark of the Crown served as a custom on Gala to identify the legitimate successor to the throne. This Mark was incredibly faint and could only be discovered through a particular examination.
The Council of Ministers possessed knowledge of the Mark, and they would evaluate the individual's presence of the Mark inside a designated chamber located far within the palace. A silver design on the room's blue mosaic floor indicated a specific square. When stepped upon, this square would trigger a sensor mechanism that enveloped the person in a shower of lights. The true heir would be illuminated by the light if they were standing on the tile; otherwise, no shadow would appear.