The home of India’s richest man, Mukesh Ambani, in Mumbai. The $1-billion home, seven years in the making, is 400,000 square feet on 27 floors, all for a family of six. The building is named Antilia, after a mythical island. (DANISH SIDDIQUI / Reuters)

The home has a swimming pool and yoga studio. By some accounts, an ice room to escape the Mumbai heat, infused with man-made snow flurries. (DANISH SIDDIQUI / Reuters)

A security staff stands at the entrance of the 27-story Antilia, the newly-built residence of Reliance Industries chairman Mukesh Ambani, in Mumbai. (DANISH SIDDIQUI / Reuters)

“It’s a stupendous show of wealth,” said Hamish McDonald, author of “Ambani & Sons: A History of the Business.” “It’s kind of positioning business tycoons as the new maharajah of India.” (DANISH SIDDIQUI / Reuters)

An Indian laborer checks his mobile phone while waiting for marblestone to be unloaded from his truck at the entrance to the twenty-seven storey Antilia, the newly-built residence of Reliance Industries chairman Mukesh Ambani in Mumbai. (DANISH SIDDIQUI / Reuters)

Ambani’s home, center, is being billed as the most expensive home in history. Anywhere. (DANISH SIDDIQUI / Reuters)

Antilia Tower, the new residence of Mukesh Ambani, chairman of India’s Reliance Industries Ltd., stands in Mumbai, India. (DANISH SIDDIQUI / Reuters)