Rod of Rassilon

The Rod of Rassilon is one of the artefacts of Rassilon, it is one of the objects from his time.

Together with the Sash of Rassilon it is used to raise the control structure for the Eye of Harmony located beneath the Capitol on Gallifrey.

The Rod of Rassilon slots into the control structure (a black obelisk) which allows the person (wearing the Sash of Rassilon) to disengage the control interfaces and gain access to the power of the Eye of Harmony. (DW: The Deadly Assassin)

The Rod of Rassilon is also given as part of the Sash of Rassilon and the Coronet of Rassilon to Presidents upon being made President of the Hight Council of Gallifrey. (DW: The Invasion of Time)