Petronas Twin Towers of Malaysia

Petronas Twin Towers or Menara Berkembar Petronas of Kuala Lumpur, Malaysia is World's Highest Twin Tower at 2014. The building was officially opened by the Prime Minister of Malaysia's Tun Dr. Mahathir bin Muhammad on 1 August 1999. The Petronas Towers' structural system is a tube in tube design, invented by Fazlur Rahman Khan.
The cross section of the towers is based on a Rub el Hizb. The Rub el Hizb (Arabic: ربع الحزب rubʿ al-ḥizb) is a Muslim symbol, represented as two overlapping squares.
A number of companies have offices in Tower Two, including Huawei Technologies, AVEVA, Al Jazeera English, Carigali Hess, Bloomberg, Boeing, IBM, Khazanah Nasional Berhad, McKinsey & Co, TCS, HCL Technologies, Krawler, Microsoft, The Agency (a modelling company) and Reuters.