The 1893 World's Fair was the perfect bait for Dr. Henry Howard Holmes (aka Herman Mudgett) to lure his estimated 200+ victims to his front door. Holmes built the 60 room, 3-story building with secret passageways, trap doors and chutes. Holmes advertised for tourists and staff. These unwary visitors and employees checked in and never left. The building burned down in 1895. Holmes was convicted and executed in 1895.