Question: Who owns the most costly home in the world, Antila?

Context paragraphs:
Stay-at-home dad: Pre-industrialisation, the family worked together as a unit and was self-sufficient.  When affection-based marriages emerged in the 1830s, parents began devoting more attention to children and family relationships became more open.  Beginning with the Industrial Revolution, large-scale production replaced home manufacturing; this shift, coupled with prevailing norms governing sex or gender roles, dictated that the father become the breadwinner and the mother the caregiver.  Beginning during World War II, many women entered the workforce out of necessity; women resumed the caregiver position after the war, but their new-found sense of independence changed the traditional family structure together with cultural shifts leading to the feminist movement and advances in birth control.  Some women opted to return to the care giver role.  Others chose to pursue careers.  When women chose to work outside of the home, alternative childcare became a necessity.  If childcare options were too costly, unavailable, or undesirable, the stay-at-home dad became a viable option.

Zara (retailer): Zara (] ) is a Spanish clothing and accessories retailer based in Arteixo, Galicia.  The company was founded in 1975 by Amancio Ortega and Rosalía Mera.  It is the main brand of the Inditex group, the world's largest apparel retailer.  The fashion group also owns brands such as Massimo Dutti, Pull and Bear, Bershka, Stradivarius, Oysho, Zara Home, and Uterqüe.  Zara as of 2017 manages up to 20 clothing collections a year.

Altamount Road: Altamount Road or Altamont Road "(more correctly)" is an upmarket residential street in South Mumbai, parallel to Pedder Road which it meets at the well-known intersection called Kemp's Corner.  On Altamont Road are the consulates of Indonesia (No. 19) and of South Africa (bungalow 20); on the connecting Carmichael Road are the Belgian, Chinese, and Japanese consulates.  The road has been in the news in recent times because of the completed construction of the costliest home in the world, Antilia, a 27-storey mansion by the Indian industrialist, Mukesh Ambani.  Recently it has been rated as the 10th most affluent street in the world.

Midas (automotive service): Midas, Inc. is an American chain of automotive service centers headquartered in Itasca, Illinois.  In its North American main and home market, Midas stores are company-owned or franchised.  In the 17 other countries it operates in, the service centers are either licensed or franchised.  Midas is one of the world’s largest providers of automotive services, offering brake, maintenance, tires, exhaust, steering and suspension services at more than 2,000 franchised, licensed and company-owned Midas shops in 13 countries, including nearly 1,300 in the United States of America and Canada.  Midas also owns the SpeeDee Oil & Auto Service business, with more than 150 auto service centers in America.

Royal Observatory of Belgium: The Royal Observatory of Belgium (Dutch: Koninklijke Sterrenwacht van België ; French: Observatoire Royal de Belgique ), is situated in Uccle (Ukkel in Dutch) since 1890.  It was first established in Saint-Josse-ten-Noode in 1826 by William I under the impulse of Adolphe Quetelet.  It was home to a 100 cm diameter aperture Zeiss reflector in the first half of the 20th century, one of the largest telescopes in the world at the time.  It owns a variety of other astronomical instruments, such as astrographs, as well as a range of seismograph equipment (such as for detecting earthquakes).

Roswell Butler Hard House: The Roswell Butler Hard House is a House located in Antioch, California owned by the City of Antioch, California.  Roswell Butler Hard was elected as Contra Costa County Supervisor 1866-1868 and Sheriff from 1867 and 1869.  He built his large two story brick house on Front (First) Street in 1869 from brick from Antioch's first brick factory.  It was considered the nicest and most costly home in the area.  It served as the meeting place for the first board of trustees for the newly incorporated City of Antioch.  He was elected mayor at this meeting.  After he died, the house was sold, upgraded and converted into three smaller units.  But by 1979, when the City of Antioch purchased the property the house had fallen into disrepair.  It is the only surviving structure built in the Italianate style of architecture during the late Victorian period.  It was the first building in Antioch to be recorded on the National Register of Historic Places.  The House is currently closed to the public, however there is a group that formed to help restore and preserve the house.  The house still stands at 815 West First Street, across from the Antioch–Pittsburg (Amtrak station).

Cheshunt Great House: Cheshunt Great House was a manor house in the town of Cheshunt, Hertfordshire, England, near to Waltham Abbey.  It is said to have been built by Henry VIII of England for Cardinal Thomas Wolsey.  The family home of the Shaw family for over a century, by the late 19th century it was used a Freemasons Hall and was later used during World War II.  After the war, the hall was too costly to run and was opened to the public until a fire gutted it in 1965.

Antilia (building): Antilia is a private home in South Mumbai, India.  It is owned by Mukesh Ambani, Chairman of Reliance Industries, which includes a staff of 600 to maintain the residence 24/7.

Will Wallner: Will Wallner (born 24 January 1987) is an English rock guitarist and songwriter.  His main influences are Ritchie Blackmore, Gary Moore and John Sykes.  He began playing guitar at age 16 and received his first "real guitar", a Gibson Les Paul Custom, which he has played his entire career, at the age of 18.  He began playing guitar by ear, then had taken his first formal guitar lessons from a rock guitar teacher in his home town of Devon, England.  He is an alumnus of the prestigious Colyton Grammar School and a graduate of the University of Portsmouth with a BSc in Music and Sound Technology and has also studied at the Musicians Institute, in Hollywood.  Since 2012 he has been a regular contributor to Guitar World magazine with his weekly blog 'Bent Out of Shape'.  He currently resides in Los Angeles, California and also owns a recording studio in Berlin, Germany.

Supporting paragraphs: Altamount Road Antilia (building)
Answer: Mukesh Ambani