Why is the Washington Monument 555 feet?
This height was chosen for several reasons.
Firstly, the monument was originally designed to be a tribute to George Washington, the first President of the United States, and it was felt that a monument of such grand proportions would be a fitting tribute to his legacy.
Secondly, the height of 555 feet was the tallest height that could be achieved at the time of its construction without compromising the stability of the structure. The original design called for a 600-foot height, but the engineers were concerned that the existing foundations wouldn’t support such a grand obelisk. They trimmed the monument’s height to 555 feet, making it ten times the width of the base.
Finally, the height of 555 feet was also chosen to make the monument the tallest structure in the world at the time, surpassing the Cologne Cathedral in Germany, which was previously the world's tallest structure at 515 feet (157 meters) tall.