Here's what we know:
* The house is located in Los Angeles, California, and has a long and tragic history. It's been a home to countless people, some of whom met their demise within its walls.
* Throughout the series, various spirits have been seen and interacted with. These include the Rubber Man, the Bloody Face, Tate Langdon, Violet Harmon, Moira O'Hara, and many others.
* The house itself seems to be sentient and plays a role in the events that unfold. It manipulates and influences its inhabitants, often in terrifying ways.
Therefore, it's safe to say that the house is haunted by a collective of spirits, both malevolent and benevolent. The specific identities and motivations of these ghosts remain a mystery, adding to the series' chilling and ambiguous atmosphere.
It's important to remember that "American Horror Story" is a fictional series. While it draws inspiration from real-life events and folklore, the specific details of the haunted house and its inhabitants are purely fictional creations.