The elevator starts running, and the Washington Monument finally opens to everyone
For three and a half years, the Washington Monument had stood finished but mostly off-limits, its 555 feet of marble and granite reachable only by those willing to climb the interior stairs. On October 9, 1888, that changed: the monument officially opened to the general public, with a new elevator carrying visitors up through the shaft alongside the spiraling iron staircase. The building had already been the tallest structure on Earth for about four years. Now, for the first time, ordinary Americans could actually reach the top of it.
The monument took forty years to finish, stalled for decades by a funding fight and the Civil War, before it was even walkable. Its 1888 opening turned a half-century national promise into something ordinary Americans could actually ride an elevator up and see for themselves, and made the obelisk the capital's signature civic landmark instead of a half-built reminder of the republic's near-failure to honor its founder.
QWhat's sealed inside the monument's cornerstone?
At the northeast corner of the foundation sits a marble cornerstone containing a zinc case packed with memorabilia, a time capsule laid decades before the 1888 opening. It was part of the original 1848 construction ceremony, long before Thomas Lincoln Casey ever redesigned the foundation above it or an elevator carried a single visitor to the top. The case has remained sealed in the foundation stone ever since, sealed there during the monument's earliest and most uncertain years.
QWhy does the monument have red lights at the top?
The pyramidion, the pyramid-shaped cap at the monument's peak, has eight observation windows and eight red aircraft warning lights, two mounted on each of its four sides. They exist purely as a hazard marker for aircraft passing near the District of Columbia's tallest structure, a practical safety feature bolted onto a nineteenth-century obelisk built decades before airplanes existed.
QWhat material problem did builders hide in the monument's foundation?
Beneath the monument's recognizable marble exterior, the foundation itself is built from bluestone gneiss, an entirely different and far less glamorous stone than the three varieties of white marble used on the visible structure above it. The mismatch traces back to the monument's stop-start construction history, when funding gaps and a decades-long suspension forced builders to work with whatever durable material the foundation required, regardless of how it matched the marble exterior above it.
