Year
1973
Month Day
April 04

World Trade Center, then the world's tallest building, opens in New York City

The “Twin Towers” of the World Trade Center officially open in New York City. The buildings replaced the Empire State Building as the world’s tallest building. Though they would only hold that title for a year, they remained a dominant feature of the city’s skyline and were recognizable the world over long before they were destroyed in a terrorist attack in 2001.

Planning, designing and clearing space for the World Trade Center took over a decade. The New York State Legislature originally approved the idea in 1943, but concrete plans did not materialize until the 1960s. The deal that created the new complex, of which the Twin Towers would be the centerpiece, also included the creation of the Port Authority Trans-Hudson Corporation, or PATH, to operate the trains which entered Manhattan from New Jersey on what was to become the grounds of the WTC. Architect Minoru Yamasaki drew inspiration from Arabic architecture for the towers’ design. In order to efficiently move people up and down the 110-story towers, Yamasaki and his team developed the concept of express elevators—based on the New York City Subway’s system of express and local trains—that traveled directly to “sky lobbies” on the 44 and 78 floor, from which “local” elevators ran to neighboring floors. The first tenants moved into the North Tower in December of 1970, with the official opening of both buildings taking place over two years later.

The towers’ construction ended the Empire State Building’s 41-year run as the tallest building in the world. They were replaced by Chicago’s Sears Tower the following year, an indication of the rising trend of supertall construction. The World Trade Center dramatically altered the New York skyline and the cityscape of Lower Manhattan. As such, they were often used as a shorthand for the area in visual media, and were frequently included in establishing shots of films set in New York. Though most of the World Trade Center was occupied by office space, the Top of the World Observation Deck on the South Tower became a popular tourist destination, as did the North Tower’s Windows on the World restaurant, which featured its own wine school.

The towers were first targeted by terrorists in 1993, when a bomb exploded in the garage under the North Tower, killing six and injuring over 1,000. The Twin Towers were destroyed, and were the site of the vast majorities of the casualties, on September 11, 2001, a final chapter that has since overshadowed the rest of the World Trade Center’s story. The building that replaced them, One World Trade Center, was completed in 2014 and is currently the seventh-tallest building in the world.

FACT CHECK: We strive for accuracy and fairness. But if you see something that doesn't look right, click here to contact us!

ALSO ON THIS DAY

Hank Aaron ties Babe Ruth's home run record

As the 1974 Major League Baseball season began, all eyes were on Hank Aaron. He had finished 1973 with 713 career home runs, one shy of the all-time record set by Babe Ruth. On April 4, Opening Day, a 39-year-old Aaron sent the very first pitch he saw over the wall, finally tying ...read more

Microsoft founded

On this day in 1975, at a time when most Americans use typewriters, childhood friends Bill Gates and Paul Allen found Microsoft, a company that makes computer software. Originally based in Albuquerque, New Mexico, Microsoft relocated to Washington State in 1979 and eventually ...read more

Second Battle of the Somme ends

During World War I, the Second Battle of the Somme, the first major German offensive in more than a year, ends on the western front. On March 21, 1918, a major offensive against Allied positions in the Somme River region of France began with five hours of bombardment from more ...read more

Harrison dies of pneumonia

President William Henry Harrison dies after serving only 32 days in office on this day in 1841. Harrison holds the unfortunate presidential record of shortest term in office. Ironically, the man with the shortest White House tenure delivered the longest inaugural address in ...read more

Maya Angelou is born

Poet and novelist Maya Angelou-born Marguerite Johnson-is born in St. Louis, Missouri. Her parents divorced when she was three, and she and her brother went to live with their grandmother in Stamps, Arkansas. When she was eight, she was raped by her mother’s boyfriend. When she ...read more

Martin Luther King Jr. is assassinated

Martin Luther King Jr. is shot to death at a hotel in Memphis, Tennessee. A single shot fired by James Earl Ray from over 200 feet away at a nearby motel struck King in the neck. He died an hour later at St. Joseph’s Hospital. The death of America’s leading civil rights advocate ...read more