Question: Where is the head office of the agency that designed the Tour Triangle?
Context: The United Transport Administration (Georgian: ერთიანი სატრანსპორტო ადმინისტრაცია ) was the transport agency of Georgia from 2005 to 2011, which united the management of road transport, civil aviation and maritime transport in the country.  The agency was subordinated first to the Ministry of Economy and Sustainable Development and then to the Ministry of Regional Development and Infrastructure.  The agency had its head office in Tbilisi. Herzog & de Meuron Basel Ltd., or Herzog & de Meuron Architekten, BSA/SIA/ETH (HdM), is a Swiss architecture firm with its head office in Basel, Switzerland.  The careers of founders and senior partners Jacques Herzog (born 19 April 1950) and Pierre de Meuron (born 8 May 1950) closely paralleled one another, with both attending the Swiss Federal Institute of Technology (ETH) in Zurich.  They are perhaps best known for their conversion of the giant Bankside Power Station in London to the new home of Tate Modern.  Jacques Herzog and Pierre de Meuron have been visiting professors at the Harvard University Graduate School of Design since 1994 and professors at ETH Zürich since 1999. The SAS Frösundavik Office Building is an office building in , Solna Municipality, Sweden, north of Stockholm.  It servers as the head office of Scandinavian Airlines (SAS) and the SAS Group.  The SAS head office was for a brief period located in a different building on the property of Stockholm Arlanda Airport in Sigtuna Municipality. Viking Airlines AB was a privately owned charter airline with a head office in Stockholm, Sweden and based in Stockholm.  Viking Airlines primarily operated charter flights for European tour operators.  The airline was established in 2003.  Viking Airlines had its head office in Spånga, Stockholm, Sweden. The Mizuho Bank Uchisaiwaichō Head Office Building (みずほ銀行内幸町本部ビル , Mizuho Ginkō Uchisaiwaichō Honbu Biru ) is a 143 m (469 ft) tall office skyscraper in Tokyo, Japan.  At 38 stories the building is the 86th tallest building in Tokyo.  It contains 1.4 million sq ft (134,974 m²) of office space, 100% of which is now occupied by Mizuho Bank, the consumer banking arm of the second-largest Japanese financial conglomerate Mizuho Financial Group, while still called the DKB Head Office from time to time. Kingfisher Airlines was established in 2003.  It is owned by the Bengaluru based United Breweries Group.  The airline started commercial operations on 9 May 2005 with a fleet of four new Airbus A320-200s operating a flight from Mumbai to Delhi.  It started its international operations on 3 September 2008 by connecting Bengaluru with London.  Kingfisher's head office is located in Kingfisher House Western Express Highway Vile Parle (E) Mumbai – 400099 India and its registered office is located in UB City, Bangalore.  Its head office was previously in the Kingfisher House in Vile Parle (East), Mumbai.  In 2012 Vijay Mallya was trying to sell the Vile Parle Kingfisher House.  The airline had shut down its operations when on 20 October 2012 the DGCA suspended its flying license.  This suspension had been due to failure to give an effective response to the show-cause notice issued by DGCA.  However, The airline had locked out its employees for several days before this suspension.  On 25 October 2012, the employees agreed to return to work.  On 7 June 2010 Kingfisher became a member elect of the Oneworld airline alliance when it signed a formal membership agreement.  Kingfisher confirmed on 20 December 2011 that it will join the Oneworld airline alliance on 10 February 2012.  Kingfisher would have been the first Indian carrier to join one of the big airline alliances.  However, on 3 February 2012, owing to bad financial situation and two days after the International Air Transport Association (IATA) clearing house suspended Kingfisher Airlines; the airlines participation to Oneworld has been put on hold. Diamanten ("The Diamond") or Oksenøyveien 3 is an office building located at Fornebu in Bærum, Norway.  It was built in 1985 as the head office of the airline Braathens SAFE, and later became the head office of SAS Braathens.  As of April 1, 2010, it has been the head office of Norwegian Air Shuttle. The Agence Nationale de l’Aviation Civile du Bénin (ANAC BENIN), in English the Benin National Civil Aviation Agency, is the civil aviation agency of Benin.  The agency has its head office in Cotonou. Future Fibre Technologies (FFT) is a fiber optic sensing technologies company based in Melbourne, Australia, with its US head office in Mountain View, California, Middle East head office in Dubai, Indian head office in New Delhi and European head office in London.  Founded in 1994, Future Fibre Technologies product line provides optical fiber intrusion detection systems for perimeters, buried oil and gas pipelines and data communication networks. Tour Triangle, also known as "Projet Triangle", or simply "Triangle", is a skyscraper to be built in the exhibition site Parc des Expositions de la Porte de Versailles in Paris, France.  Designed by the Swiss agency Herzog & de Meuron, it will take the shape of a 180 m tall glass pyramid with trapezoid base, wide from one side and narrow from another.  It will be the only tall building built in central Paris since the 1973 Montparnasse tower.
Answer: Basel, Switzerland