Aug 1991
Cesar Pelli's design declared winner for the
KLCC Petronas Twin Towers Project
1992
KLCC Petronas Twin Towers project launched
Mar 1993
Excavation for the twin towers foundations began
Mar 1994
Foundation for Tower 1 ready, Hazama Corporation started construction of Tower 1
Apr 1994
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
June 96
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.
Early 1997
Occupation began
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.
