design declared winner for the KLCC Petronas Twin Towers
KLCC Petronas Twin Towers project launched
Excavation for the twin towers foundations began
Foundation for Tower 1 ready, Hazama Corporation started construction of Tower 1
Preparation for construction of Tower 2 begun by Samsung Corporation.
1st week of May 1995
The pre-assembled skybridge arrived from Korea in 493 pieces weight 452.64 tonnes.
July 6, 1995
Skybridge lifted to its place between 41st and 42nd floor
10 Aug 95
The skybidge assembled and put in place between the two towers.
13 Feb 96
Topping-up of both towers (everything's ready except the pinnacle)
5 Mar 96
Installation of pinnacle completed for Tower 2
11 Mar 96
Installation of pinnacle completed for Tower 1
Cladding was completed.
15 April 96
Declared the world's tallest building by the Council of Tall Buildings and Urban Habitat of Pennsylvannia, United States.
31 Aug, 1999
Officially opened By Tun Dr. Mahathir Mohamad, 4th Prime Minister of Malaysia.
31 Dec, 2000
The Petronas Twin Towers became the world's tallest building in the 21st century.
17 Oct, 2003
Taipei 101 became the world's tallest building. However, Petronas Twin Towers remained the tallest Twin Towers in the world.