Inside DC's Golden 1,000-Capacity Ballroom a Mile From the White House

As President Donald Trump advances plans for a new ballroom at the White House-part of a wider set of proposals aimed at reshaping ceremonial and public-facing spaces in Washington-the debate has drawn attention to the kinds of venues the federal government already operates nearby.

Just over a mile from the White House sits the Andrew W. Mellon Auditorium, with the main event space described as a “show-stopping masterpiece of Neoclassical architecture.”

“Towering 45′ Roman Doric columns line the perimeter, supporting a newly-restored, gilded frieze that wraps the room in real gold and opulent detail,” the website continues. The grand room is capable of hosting around 650 seated guests or up to roughly 1,000 people in total-similar to the scale envisioned for the proposed ballroom, and already used by multiple presidents, including Trump.

What Is The Andrew Mellon Auditorium?

Located in the Federal Triangle and operated by the General Services Administration (GSA), the Andrew Mellon Auditorium was built in the 1930s as a dedicated ceremonial venue for the federal government. On February 25, 1935, President Franklin D. Roosevelt officially dedicated the building.

Named after former Treasury Secretary Andrew Mellon, it was designed specifically for formal, high-capacity events, including presidential functions and inaugural balls. While federally owned, the building is leased through the GSA which allows it to be rented by the government and private citizens.

How Has The Mellon Auditorium Been Used?

The auditorium has hosted some of the most significant diplomatic moments in modern history. In 1949, it was the site of the signing of the North Atlantic Treaty, establishing NATO, the military alliance that remains central to Western security policy today.

It was later used during NATO's 50th anniversary summit, reinforcing its role as a venue for major international gatherings.

Alongside these landmark events, the space has been regularly used by successive administrations for large federal ceremonies, diplomatic meetings and multi-agency events, undergoing restoration in 2023.

President Bill Clinton delivered the keynote speech at the The New Republic's Centennial Gala at the Andrew W. Mellon Auditorium on November 19, 2014, while President Barack Obama gave a speech at the eighth White House Tribal Nations Conference at the Andrew W. Mellon Auditorium on September 26, 2016.

More recently, singer Nicki Minaj joined Trump on stage at the Treasury Department’s Trump Accounts Summit at Andrew W. Mellon Auditorium on January 28, 2026.

Why the Ballroom Proposal Is Drawing Attention

Trump's proposed $400 million ballroom would significantly expand the White House's on-site capacity for formal events.

The proposal sits alongside a broader set of plans for new or redesigned public spaces in Washington, including the National Garden of American Heroes. Trump has framed the ballroom as a way to create a more suitable setting for large, high-profile gatherings within the White House grounds.

The idea has also been shaped in part by the logistical and security demands of hosting major events. In April, an armed attacker sprinted through a security checkpoint at the White House Correspondents’ Association dinner at the Washington Hilton toward the room full of politicians, celebrities and the president. The moment bolstered the administration’s rationale for the ballroom, Trump has said the new ballroom would be “drone-proof” and include “bulletproof glass,” adding: “We need the ballroom.”

At the same time, the project has drawn scrutiny from some lawmakers over its cost and funding. Construction is underway, including demolition of the White House's East Wing to make way for the new ballroom.

While Trump has repeatedly said the ballroom itself will be financed through private donations, recent proposals in Congress have raised the prospect of taxpayer funding for related elements-particularly security infrastructure tied to the "East Wing modernization" project.

In May 2026, some Republican lawmakers pushed plans that could authorize hundreds of millions of dollars, and potentially up to $1 billion, for security upgrades connected to the project, citing increased threats and recent incidents at high-profile events. It is not yet clear what level of public funding, if any, will ultimately be approved.

A security expert told Newsweek the White House offers a level of protection difficult to replicate at outside venues. Philip Farina, founder of Risky Business and a former federal law enforcement officer, said: "The White House is one of the most secure buildings on the planet. The building itself and grounds contains many layers of high level security and protection, most of which the public will never see or know about."

He added that while large events can be secured elsewhere, "any public space can be more difficult to secure… it will not provide the same level of security as the White House."

The Andrew Mellon Auditorium entered the public conversation recently, evidenced by a spike on Google Trends, with the term “Andrew Mellon Auditorium” seeing a 300 percent rise over the past month, and “Mellon Auditorium” seeing a 350 percent spike in queries.

How It Compares to Trump's Proposed Ballroom

The Mellon Auditorium and Trump's proposed ballroom are designed to meet a similar need, but take different approaches:

• Capacity: Both spaces can accommodate large audiences, with the Mellon hosting up to around 1,000 people and roughly 650 seated. Trump has said his proposed ballroom would have capacity for 999 people.
• Size: The Andrew W. Mellon Auditorium consists of an 8,000-square-foot main hall and around 14,000 square feet of usable event space, while the proposed White House ballroom is set to add around 90,000 square feet.
• Location: The Mellon sits just under a mile from the White House; the ballroom would be located on the White House grounds itself.
• Status: The Mellon is an existing, government-owned venue already in use; the ballroom would be a newly constructed addition.
• Function: Both are intended for formal gatherings such as ceremonies, diplomatic events and large-scale meetings.

For decades, administrations have relied on nearby federal venues like the Mellon Auditorium to host larger events while keeping the White House as the symbolic center, while the proposed ballroom would shift that model, bringing comparable capacity directly inside the White House grounds.

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This story was originally published May 20, 2026 at 4:48 AM.