The Cloister Room was a section of the Doctor's TARDIS. It appeared to be ancient with benches on the sides of the room and plants growing on the crumbling pillars. The Fourth Doctor visited this room with Adric shortly before his regeneration. (TV: Logopolis)

Whilst searching for his Five Hundred Year Diary, the Fourth Doctor believed that he left it in the Cloister Room. However, Romana I told him that it was in the TARDIS' swimming pool. (AUDIO: The Final Phase)

The Fifth Doctor used to hide from Tegan Jovanka in the Cloister Room. (AUDIO: No Place Like Home)

Constance Clarke compared the Cloister Room to "an ugly industrial cathedral". (AUDIO: Absolute Power)

Ace attempted to relax in the Cloister Room, but gave up when the bell would not stop ringing. (PROSE: Cat's Cradle: Witch Mark)

When the TARDIS interior went through a metamorphosis, the Cloister Room became a grand and gothic room, similar to a place of worship, with an interface with the Eye of Harmony. (TV: Doctor Who) The Eighth Doctor visited the Cloister Room shortly after his regeneration, where he fell victim to the Master's trap. (PROSE: The Eight Doctors)