Rassilon is a fictional character in the British science fiction television series "Doctor Who". In the backstory of the programme, he was the founder of Time Lord society on the planet Gallifrey. After the original television series ended in 1989, Rassilon's character and history were further developed in books and other media. Wikipedia
The definitive Wikipedia entry for Rassilon. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Rassilon