Stagg Mansion was the lavish, palatial estate of billionaire inventor Simon Stagg. Stagg lived at the manor along with his late wife Maya, his daughter Sapphire and his Neanderthal servant Java. Although the bulk of Stagg's scientific interests were conducted at Stagg Enterprises, he maintained his own private laboratory in the sub-levels of his mansion. One of Stagg's former assistants, Kurt Vornak, once broke into the mansion and sabotaged Stagg's laboratory. The incident prompted a chemical explosion which transformed Vornak into a disembodied atomic energy man.