A Shoggoth on the Roof is a parody musical of Fiddler on the Roof based on the works of H. P. Lovecraft. Published by the H. P. Lovecraft Historical Society, it is credited to a member of the society who is referred to only as "He Who (for legal reasons) Must Not Be Named".
There have been many legal difficulties in performing "Shoggoth"; however, it was staged for the first time, in a Swedish translation, at Miskatonicon, a H. P. Lovecraft convention in Sweden, on November 4, 2005. It was staged for the first time in English at a games convention, Leprecon in Ireland on February 23, 2007. The production was organised by the Trinity College, Dublin Gamers Society. They avoided the legal issues surrounding the Fiddler on the Roof score by using a completely new score written for the musical by Aidan Marsh.
The "Tevye" of this parody is Professor Henry Armitage, the librarian at the fictional Miskatonic University. It is set in 1920s America.
The action is set in the fictional town of Arkham, Massachusetts. The action opens in a manner reminiscent of Fiddler, with a shoggoth on the roof of the Miskatonic library building. Armitage addresses the audience, speaking of all the strange things in Arkham and its horrific history. He then explains how a shoggoth can stay up on "such a pointed roof": Tentacles! ("Tentacles")
Back at Armitage's house, his three daughters, Prudence, Asenath and Jill, along with their mother Marion are cleaning. The three daughters begin chatting and Prudence reveals that she has fallen in love with Herbert West, a doctor and assistant professor at the university. Meanwhile, Armitage arrives home, and he and Marion discuss finding a suitable husband for Prudence. Marion suggests Wilbur Whately, and Armitage agrees to ask him to lunch. ("Arkham, Dunwich") Prudence hears this and rushes off to see Herbert.