Unseen University (UU) is a school of wizardry in Terry Pratchett's fictional Discworld city of Ankh-Morpork, staffed by a faculty composed of mostly indolent and inept old wizards. The university's name is a pun on the real-world Invisible College. One of the most notable rooms in Unseen University is Room 3b. This room is not believed to exist, but a surprising number of classes are scheduled there. In fact, at times of great celebration in the city of Ankh-Morpork it is not uncommon for the entire faculty to be teaching there.