H. H. Holmes, born Her
man Webster Mudgett on May 16, 1861, is infamous in American history as a prolific serial killer known for his chilling “Murder Castle.” Holmes operated during the late 19th century in Chicago, where he designed and built a hotel equipped with trap doors, soundproof rooms, and gas chambers to carry out his gruesome acts. His eerie castle became a house of horrors where Holmes lured unsuspecting victims, leading to his moniker as one of the most notorious criminals in U.S. history.