Italy used its current tri-colored flag for the first time.
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The iconic Leaning Tower of Pisa leaned 'too far,' which resulted in its closure.
The first US commercial bank, The Bank of North America, opened in Philadelphia.
Beyoncé and Jay-Z welcomed their daughter, Blue Ivy Carter, into the world.
President Truman announced to the people of America that they successfully developed a hydrogen bomb.
A 57-year-old man received the first transplanted heart from a genetically modified pig.
