Chapter The Chapters of Gallifrey — often called ruling Houses or colleges — were the Great House s closest to the Lord President . ( PROSE : " Lungbarrow " , " The Book of the War " , " The Ancestor Cell " ) Each Chapter was represented in the Time Lord Academy by a college bearing their name , ( PROSE : " A Brief History of Time Lords " , " The Ancestor Cell " ) such as the Prydonian Academy ( PROSE : " " ) and the Academy of the Patrexes . ( PROSE : " Damaged Goods " ) Many of the ruling bloodlines had sub - lines dedicated to exploring particular genetic philosophies . ( PROSE : " The Book of the War " ) The Doctor and Romana were both members of the Prydonian Chapter ( TV : " Extremis " , PROSE : " Shada " ) despite also belonging to Houses Lungbarrow and Heartshaven , respectively . ( PROSE : " Lungbarrow " , AUDIO : " Panacea " ) According to Commander Hallan , marriage was a way of strengthening the bonds between Houses and Chapters . ( AUDIO : " Spirit " ) The heads of the Chapters were the Lord Cardinal s , and the chief of these in a chapter was known as the Cardinal Prime . ( PROSE : " Lungbarrow " ) History . The original Chapters . Each college was founded by one of the six legendary founders of Time Lord society , ( PROSE : " The Ancestor Cell " ) who were present at the anchoring of the thread . ( PROSE : " The Book of the War " ) They included Rassilon , Omega , Pandak , Apeiron , and one other , as well as possibly Eutenoyar . ( PROSE : " The Infinity Doctors " , " The Ancestor Cell " ) The most prominent of the original Chapters was the Prydonian Chapter , whose members included more Lord Presidents than any other Chapter . Its significance was closely followed by the Arcalian and Patrex Chapters . ( TV : " The Deadly Assassin " ) The Dromeian , Cerulean , ( PROSE : " Lungbarrow " ) and Scendeles Chapters were overshadowed by the others . ( PROSE : " The Ancestor Cell " ) These original ruling Houses were almost indistinguishable ; " The Book of the War " said the members of all six were " equally pale and complacent " . ( PROSE : " The Book of the War " ) House Ixion and House Catherion were ruling Houses that began a slow decline after the anchoring of the thread and the ensuing Diaspora . They were eventually replaced by House Mirraflex and House Lineacrux . ( PROSE : " The Book of the War " ) During the War . During the War , political upheavals and social reforms on the Homeworld led to almost continual replacement of the ruling Houses as Newblood Houses were founded and other Houses rose and fell in importance . By the War ' s fifieth year , the six ruling Houses were the three traditional , political Houses Dvora , Tracolix , and Lineacrux , along with the three military Houses Arpexia , Xianthellipse , and Mirraflex . ( PROSE : " The Book of the War " ) House Mirraflex was a noble family during the Last Great Time War . ( AUDIO : " The Conscript " ) Ceremonial colours . Each Chapter had its own dominant colour and wore robes of that colour during ceremonial occasions , such as the inauguration of a new Lord President . Prydonian s used scarlet and orange ; ( TV : " The Deadly Assassin " ) the secret minutes of House Dvora were kept in the records library ' s " Scarlet Chapterhouse " collection . ( AUDIO : " A Labyrinth of Histories " ) The Scendeles ceremonial robes ranged from a light pink to a darker shade of red . ( PROSE : " The Ancestor Cell " ) The Arcalian Chapter used green and the Patrexian s used . ( TV : " The Deadly Assassin " ) Dromeian s used silver - grey and Cerulean s , as their name would indicate , used blue . ( PROSE : " Lungbarrow " ) Members of House Lineacrux wore yellow robes . ( PROSE : " The Brakespeare Voyage " ) The colour gold was reserved for the Gold Usher . ( TV : " The Deadly Assassin " )