The Lord or Lady President (or President of the Council or simply President) governed the High Council of Time Lords, making him or her the holder of the most powerful office on Gallifrey.
The ceremonial privileges of the President included access to the APC Net by means of the Matrix Crown (DW: The Invasion of Time) and the possession of the Sash and Rod of Rassilon (sometimes also called the Key of Rassilon). (DW: The Deadly Assassin)
The President also had the formal responsiblity, not attempted in reality, to seek the Great Key of Rassilon (a separate artefact from the Rod of Rassilon, also sometimes referred to as the Key of Rassilon). (DW: The Invasion of Time)
Holders of the office of President
Rassilon - 1
(The Time of Legend: begining of the Intuitive Revelation till almost a 1000 years later) Took power from the 508th Pythia. The Time Lords, led by Pandak III, rebel against Rassilon's cruelty and entomb him in the Dark Tower where he remains forever in eternal sleep.
Pandak - 2
Took over from Rassilon.
Pandak III - ?
(ruled for 900 years).-9250<? to ? One of the longest serving Presidents in the last 10,000 years.
Unknown President - ?
? (less than 900 years before Time of My Life) -to- Time of My Life (The Doctor's grandfather) Rules for a very long time. Dies of old age during the Time of my Life Crisis.
Varda - N/A
? right after Time of My Life but the position is only temporary. The Doctor's grandmother. Temporarly held the position of President untill elections could be held. (there has never been a female president by Infinity Doctors)
?? -
-150~ to 86? Gallifrey's first female President rules sometime is in power some time after -150. She rejects Iris Wildthyme's application to the Time Academies.
Morbius - 399
21-23 Leaves Gallifrey and forms the Cult of Morbius. Is the First Time Lord to be vaporised.
Saran - 400
27- ?? (decades to 200 years)
Drall - 401
?? to ?? (was President when doc graduated) Was replaced by his cousin Pundat III after the Doctor graduated.
Pundat III - 402
?? to 326 (decades to 200 years) Died of stress. He named Slann as his successor.
Slann - 403
326 to 330 Assasinated by Koschei.
? - 404
330 to 351? Gunned down by Azmeal
Pandar V - 405
(A few centuries) 351 to 750 Killed by Goth.
Greyjan - 406
three terms 752-755 Comits scuicide.
The Doctor - 407
756 to 756 Annouced Borusa as successor.
Borusa - 408
759 - ?808-849? Entombed by Rassilon
The Doctor - 409
? - ? (at least 3 years) Deposed by Flavia.
Flavia - 410
? to ? Lost to Niroc in a rigged election.
Niroc - 411
? to 900 Deposed by Flavia.
Flavia - 412
900 to 1001~ Lost election to Romana
Romana - 413
1001 to 1009?
Unknown President - 414
1009 to 1029?
Romana - 415
1029 to ?