Why the Victorian Mansion is a Horror Icon

Why the Victorian mansion is a horror icon is a screamer video made by American news and culture website, Vox. The video explains to the viewer what made Victorian mansions scary, but at the end of the video, after the narrator says "There's something not quite right with this house", Pennywise pops up with a scream.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=2xvNhN1PsRw