Which cell phone does Nita Ambani use?

The name itself is shrouded in legend, but the project itself seems even more fantastic. Named after the mythical island of Antilia, the Indian entrepreneur Mukesh Ambani is currently building a villa for his family that exceeds many standards.

The house will grow 27 floors and around 170 meters into the sky of the megacity of Mumbai, formerly Bombay. Gardens are being created on several floors from which climbing plants climb, and according to the US magazine Forbes even a room with artificial snow drifts is supposed to provide the necessary cooling from India's heat.

But the most spectacular thing about the structure is the price, because Antilia will be the first property to cost more than a billion dollars.

On the next page: Already today a 22-storey building.

Castle in the air over the slums

For the oil and chemical tycoon Ambani, the move planned for the coming year will bring little change from the outside.

The head of the petrochemical company Reliance Industries already lives with his wife and three children in a 22-storey residence. In return, the design of the new home should now be all the more spectacular.

On the next page: The fifth richest person in the world - in a house with silver-plated banisters.

Castle in the air over the slums

The first six floors are used as garages. More than 100 parking spaces are available there for the Ambani fleet, which Forbes has in its latest billionaire ranking as the fifth richest people in the world.

A cinema, a swimming pool with fitness rooms and a nearby yoga studio as well as a ballroom with silver-plated banisters and numerous crystal chandeliers will be built on further floors.

The lower part of the house is closed off by a multi-storey garden. The arrangement of the floors follows the Indian architectural theory Vastu, in which buildings are designed in harmony with their environment.

On the next page: A garden that bundles energy flows.

Castle in the air over the slums

The garden in the middle of the building is supposed to bundle the energy flows of the house before the real luxury of Ambani's private realm begins on the top floors.

Ambani's wife Nita posed a particular challenge to the two American architects in charge, Perkins & Will and Hirsch Bedner Associates: If a certain precious metal or exquisite wood is used on one floor, it should be left out on the remaining floors.

On the next page: Panorama platform with a view of the Indian Ocean - and the slums.

Castle in the air over the slums

The diversity created in this way is crowned by a panorama platform. From there the view extends over Bombay's skyline to the Indian Ocean.

However, Ambani's gaze will inevitably wander over the less beautiful districts of the city. When India was last census in 2001, nearly half of Bombay's twelve million people lived in slums.

There, the criticism of the luxurious building plans has recently increased so much that Ambani's company and his architects only say when asked about the villa: "The boss doesn't want to say anything more about his new house."