American Horror Story font here refers to the font used in the title of American Horror Story, which is a horror drama television series first aired on FX in 2011. The second season titled American Horror Story: Asylum premiered in October, 2012.
The font used in the title card as well as the promotional poster for its title is very similar to Rennie Mackintosh designed by Charles Rennie Mackintosh in 1993. The font is a commercial one and you can know more details and purchase it here.
The Rennie Mackintosh font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel, some of which are available for free download.
In addition to American Horror Story, It seems we can’t find other examples (logos, movie posters, album covers etc.) of Rennie Mackintosh typeface in use.