Top of the World Trade Center Observatories

World Trade Center
The original World Trade Center in March 2001. The tower on the left, with antenna spire, was 1 WTC. The tower on the right was 2 WTC. All seven buildings of the WTC complex are partially visible; refer to map below. The red granite-clad building left of the Twin Towers was the original 7 World Trade Center. In the background is the East River.
Show map of Manhattan Show map of New York Show map of the US Location within Manhattan
Record height
Tallest in the world from 1971 to 1973
Preceded by	Empire State Building
Surpassed by	Willis Tower
General information
Status	Destroyed
Location	Lower Manhattan, New York City
Coordinates	40°42′42″N 74°00′45″W / 40.71167°N 74.01250°W / 40.71167; -74.01250Coordinates: 40°42′42″N 74°00′45″W / 40.71167°N 74.01250°W / 40.71167; -74.01250
Groundbreaking	August 5, 1966
Construction started	1 WTC: August 1968 2 WTC: January 1969 3 WTC: December 1979 4, 5, and 6 WTC: 1970 7 WTC: 1983
Completed	1 WTC: December 23, 1970 2 WTC: July 19, 1971 3 WTC: July 1981 4, 5, and 6 WTC: 1975 7 WTC: May 1987
Opening	April 4, 1973
Destroyed	September 11, 2001
Owner	Port Authority of New York and New Jersey
Other information Height Antenna spire 1 WTC: 1,728 feet (526.7 m) Roof 1 WTC: 1,368 feet (417 m) 2 WTC: 1,362 feet (415.1 m) 3 WTC: 250 feet (76.2 m) 4 and 5 WTC: 120 feet (36.6 m) 6 WTC: 110 feet (33.5 m) 7 WTC: 610 feet (185.9 m) Top floor 1 WTC: 1,355 feet (413 m) 2 WTC: 1,348 ft (411 m) Technical details Floor count 1 and 2 WTC: 110 floors 3 WTC: 22 floors 4 and 5 WTC: 9 floors 6 WTC: 8 floors 7 WTC: 47 floors Floor area 1 and 2 WTC: 4,300,000 sq ft (400,000 m2) each 4, 5, and 6 WTC: 500,000 sq ft (50,000 m2) each 7 WTC: 1,868,000 sq ft (170,000 m2) Lifts/elevators 1 and 2 WTC: 99 each Design and construction Architect Minoru Yamasaki Emery Roth & Sons Developer
Engineer	Worthington, Skilling, Helle & Jackson,Leslie E. Robertson Associates
Main contractor	Tishman Realty & Construction Company
References
I. ^ World Trade Center at Emporis

Port Authority of New York and New Jersey

The original World Trade Center was a large complex of seven buildings in Lower Manhattan, New York City, United States. It featured the landmark twin towers, which opened on April 4, 1973, and were destroyed as a result of the September 11 attacks in 2001. At the time of their completion, the "Twin Towers"—the original 1 World Trade Center, at 1,368 feet (417 m); and 2 World Trade Center, at 1,362 feet (415.1 m)—were the tallest buildings in the world. The other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC, 5 WTC, 6 WTC, and 7 WTC. All these buildings were built between 1975 and 1985, with a construction cost of $400 million ($2,300,000,000 in 2014 dollars). The complex was located in New York City's Financial District and contained 13,400,000 square feet (1,240,000 m²) of office space.

The World Trade Center experienced a fire on February 13, 1975, a bombing on February 26, 1993, and a robbery on January 14, 1998. In 1998, the Port Authority decided to privatize the World Trade Center, leasing the buildings to a private company to manage, and awarded the lease to Silverstein Properties in July 2001.