Welcome to Wiki Wednesday (say that five times fast), where each Wednesday I’ll share an article from the dubiously encyclopedic website. Sometimes it’ll be topical, sometimes random — either way, maybe you’ll walk away having learned something new. Can’t be any worse than what they’re teaching kids in schools these days.

H.H. Holmes (the original Triple H) is considered to be America’s first serial killer. In all, it is estimated he killed near 200 people during his lifetime. He murdered a majority of them during Chicago’s World’s Columbian Exposition, in a ‘hotel’ he had built which was later dubbed his “Murder Castle.” Click below to read all about his macabre past-times.