when did they build the empire state building
Empire State Building The Empire State Building is a 102-story[b] Art Deco skyscraper in Midtown Manhattan, New York City. Designed by Shreve, Lamb & Harmon and completed in 1931, the building has a roof height of 1,250 feet (380 m) and stands a total of 1,454 feet (443.2 m) tall, including its antenna. Its name is derived from "Empire State", the nickname of New York. As of 2017[update] the building is the 5th-tallest completed skyscraper in the United States and the 28th-tallest in the world. It is also the 6th-tallest freestanding structure in the Americas.
One World Trade Center The building's architect was David Childs, whose firm Skidmore, Owings & Merrill (SOM) also designed the Burj Khalifa and the Willis Tower. The construction of below-ground utility relocations, footings, and foundations for the new building began on April 27, 2006. One World Trade Center became the tallest structure in New York City on April 30, 2012, when it surpassed the height of the Empire State Building. The tower's steel structure was topped out on August 30, 2012. On May 10, 2013, the final component of the skyscraper's spire was installed, making the building, including its spire, reach a total height of 1,776 feet (541Â m). Its height in feet is a deliberate reference to the year when the United States Declaration of Independence was signed. The building opened on November 3, 2014;[2] the One World Observatory opened on May 29, 2015.[3]