Washington Monument Height – America's Marble Obelisk
The Washington Monument soars 555 feet (169 meters) above the National Mall, standing as the world's tallest predominantly stone structure and the tallest obelisk ever constructed. Completed in 1884 after 36 years of interrupted construction, this Egyptian-inspired monument honors George Washington, America's first president and founding father. The monument's simple yet powerful form has become an enduring symbol of American democracy and one of the most visited landmarks in the nation's capital.
Washington Monument Quick Facts
- Official Height: 555 feet 5⅛ inches (169.3 meters)
- Base Width: 55 feet (16.8 meters) square
- Weight: Approximately 90,854 tons
- Location: National Mall, Washington, D.C.
- Completed: 1884 (construction: 1848-1884)
- Design: Egyptian obelisk
Stone Obelisk at 555 Feet
The Washington Monument's 555-foot height makes it the world's tallest stone structure, constructed primarily from marble, granite, and bluestone gneiss. Architect Robert Mills designed it as a classical Egyptian obelisk with a pyramidion cap, standing on a height-to-width ratio of approximately 10:1. The walls are 15 feet thick at the base, tapering to 18 inches at the top. A visible color change approximately 150 feet up marks where construction resumed after a 23-year hiatus (1854-1877) caused by funding issues and the Civil War—different marble sources resulted in slightly different shading.
The structure contains 36,491 blocks of stone, with an internal iron framework added during the second phase of construction to provide additional support. The foundation consists of a massive bluestone gneiss base extending 37 feet below ground. The monument incorporates 193 memorial stones donated by states, foreign countries, and organizations, embedded in the interior walls and visible during the climb up the 897 steps. The aluminum apex—at the time one of the most expensive metals—was the largest aluminum casting ever made when placed in 1884, chosen for its resistance to corrosion and lightning. The monument functions as a lightning rod, struck frequently during storms.
Views from the Summit
An elevator transports visitors to the observation level at 500 feet, offering views through eight windows facing the cardinal and ordinal directions. On clear days, visibility extends 30-40 miles, encompassing the U.S. Capitol, White House, Lincoln Memorial, Jefferson Memorial, and Pentagon, along with Arlington National Cemetery and distant Virginia and Maryland landscapes. The monument originally allowed visitors to climb the 897 steps, though this is now only available on special occasions. The structure receives approximately 800,000 visitors annually, making it one of America's most popular monuments despite being closed for repairs after earthquake damage in 2011 and subsequent renovations.
Comparison to Other Tall Structures
| Structure | Height | Comparison |
|---|---|---|
| Seattle Space Needle | 605 ft (184 m) | 50 feet taller |
| Washington Monument | 555 ft (169 m) | Tallest stone structure |
| Ulmer Münster | 530 ft (161 m) | 25 feet shorter |
| Great Pyramid (original) | 481 ft (146 m) | 74 feet shorter |
Related Washington D.C. Monuments
Explore heights of other National Mall landmarks: Lincoln Memorial, U.S. Capitol Dome, Jefferson Memorial, Washington National Cathedral, and Statue of Liberty.
Frequently Asked Questions
How tall is the Washington Monument?
The Washington Monument stands at 555 feet 5⅛ inches (169.3 meters), making it the world's tallest predominantly stone structure and tallest obelisk.
Why is there a color change on the Washington Monument?
The visible color change about 150 feet up marks where construction resumed after a 23-year pause. Different marble quarries were used, resulting in slightly different shading between the lower and upper sections.
Can you go inside the Washington Monument?
Yes, visitors can take an elevator to the observation level at 500 feet. While the monument has 897 stairs, climbing is generally only available during special tours and events.
Why is the Washington Monument an obelisk?
The Egyptian obelisk design was popular in the early 19th century as a symbol of timelessness and permanence, deemed appropriate for honoring George Washington's enduring legacy.
How long did it take to build the Washington Monument?
Construction began in 1848 but was interrupted from 1854 to 1877 due to funding issues and the Civil War. The monument was finally completed in 1884, taking 36 years total.