The Marsten House is essentially a character in it's own right in Stephen King's vampire novel Salem's Lot. The house overlooks the town of Jerusalem's Lot and is considered to have an evil presence. The former residence of murderer Hubie Marsten (where he killed himself and his wife) the house has haunted Ben Mears for his entire life. He returns to the Lot to write about the house, but after he arrives he discovers that the house has been purchased by Kurt Barlow, an Austrian immigrant who has arrived in the Lot ostensibly to open a store. Barlow is on an extended buying trip; only his business partner, Richard Straker, is seen in public.
The Marsten House represents the evil and corruption that exists in the town. In the novel it is described as sitting above the town "like a ruined king" and that the evil that Hubie Marsten did in the house has left a "dry charge" behind which attracts other evil such as Kurt Barlow.