Inside the World's First Billion-Dollar Home

Forbes estimated Ambani's net worth at $43 billion in March. Reliance Industries was founded by Mukesh's father, Dhirubhai Ambani, in 1966, and is India's most valuable firm by market capitalization. The couple, who have three children, currently live in a 22-story Mumbai tower that the family has spent years remodeling to meet its needs. They consulted with architecture firms Perkins + Will and Hirsch Bedner Associates, the designers behind the Mandarin Oriental, based in Dallas and Los Angeles, respectively. Forbes + Images