Seal of Rassilon

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The Seal of Rassilon was a symbol used by the Time Lords.

Use by the Time Lords

The seal was a symbol of power, utilised by Rassilon during the war against the Great Vampires and Old Ones (EDA: Interference - Book Two).

The Seal was used as a symbol of identification, and something akin to deep reverence. (DW: The Five Doctors, Doctor Who) Time Lords displayed the Seal of Rassilon in places of great power. (DWN: Doctor Who - The Novel of the Film) The Seal was also said to be an ancient symbol for warding off evil. (NA: The Pit)

When he sent the Master into the Death Zone to rescue the Doctor, Lord President Borusa gave the Master the "Seal of the High Council," a round metallic object emblazoned with the Seal of Rassilon, hoping it would convince the Doctor of the Master's good intentions. (DW: The Five Doctors)

At some point, the Time Lords also used a different seal, bearing Gallifreyan markings. (DW: The Sound of Drums)

Use by Other Cultures

The symbol was also taken up by other cultures whom the Time Lords visited early in their explorations of space and time, such as the inhabitants of Voga. (DW: Revenge of the Cybermen, NA: Cat's Cradle: Time's Crucible)

Occurrences

The Eye of Harmony in the Eighth Doctor's TARDIS, decorated with the Seal. (DW: Doctor Who)

Known objects to be marked with the Seal of Rassilon include: