The Empire State Building took 410 days to build. Construction began on March 17, 1930, and the opening ceremony took place on May 1, 1931. The pre-construction work of demolishing the existing building and excavating the site took less than two months.Know More
John J. Raskob, a financial executive for DuPont and General Motors, bought the old Waldorf-Astoria Hotel and had it demolished to prepare a site for the new construction. Architects designed a building with compact center space surrounded by a perimeter of offices whose floor space diminished on the upper floors. All the equipment used in construction was bought new and specifically fitted for the work. As many as 3,400 workers were employed daily. The skeleton of steel girders went up first, followed by the bricks and the interior electrical and plumbing work. All of the work was carefully timed, and much of it took place simultaneously. The 102 floors were serviced by seven banks of elevators installed by the Otis Elevator Company.
Before construction, the cost of the Empire State Building was estimated at $50 million, but due to low wages during the Depression, the total cost came to just under $41 million. New York Mayor Jimmy Walker spoke at the ribbon-cutting ceremony, and President Herbert Hoover pushed a symbolic button at the White House to light the building for the first time.Learn more about Architecture
It took 177 years to build the Leaning Tower of Pisa. The construction of the tower began in 1173 A.D., and it began to sink in 1178 A.D. The tower was closed to the public in 1990 for fear of collapsing; however, it was reopened in 2001.Full Answer >
Stonehenge was built in four stages and although archaeologists do not know for certain how long it took to build, it is assumed that it took about 1,500 years to complete. Stonehenge was completed around 3,500 years ago.Full Answer >
Construction of the Sydney Opera House took 16 years, with construction beginning in 1957 and finishing in 1973. The design and complications in various areas made the project a large source of debate regarding the time and money spent on the project.Full Answer >
More than 20,000 workers and 1,000 elephants were used in the construction of the Taj Mahal. Construction of the Taj Mahal began in 1632 and took 20 years to complete. Workers came from India, Persia, Europe and the Ottoman Empire. The Taj Mahal is a mausoleum made from white marble.Full Answer >