MEDORA, N.D. — Hedge fund founder and philanthropist Kenneth C. Griffin has donated $26 million to help complete the Theodore Roosevelt Presidential Library, providing one of the institution's largest gifts as it prepares to open on July 4, 2026 — the 250th anniversary of American independence.

The contribution will fund the library's west wing, which will be named the Kenneth C. Griffin West Wing.

The entrance will house permanent and rotating exhibitions, educational programming, and public gathering spaces dedicated to the life and legacy of the nation's 26th president.

The library itself is historic. Designed by internationally acclaimed architecture firm Snøhetta, it will be the nation's only carbon-neutral presidential library, blending into the rugged North Dakota Badlands that profoundly shaped Theodore Roosevelt's life.

Unlike many modern presidents, Roosevelt never had a presidential library. Most of his papers have long been housed at Harvard University and other institutions, leaving historians without a single museum and archival center dedicated exclusively to preserving and interpreting his remarkable life and presidency.

The new library fills that gap more than a century after Roosevelt left office.

Its location is no accident.

Roosevelt first came to the Badlands in 1883 to hunt bison but returned after the devastating deaths of his wife, Alice Hathaway Lee Roosevelt, and his mother on the same day in 1884.

Seeking solace, he immersed himself in ranching and the harsh landscape of western North Dakota.

Roosevelt later wrote that he "would not have been President had it not been for my experiences in North Dakota," crediting the Badlands with forging his character, resilience, and conservation ethic.

Those experiences would influence his presidency, during which he permanently transformed America's approach to public lands.

Roosevelt established five national parks, 18 national monuments, 150 national forests, and protected approximately 230 million acres of public land, earning recognition as one of America's greatest conservation presidents.

Roosevelt is widely regarded as the nation's first modern president.

During his administration from 1901 to 1909, the United States emerged as a global power through an expanded Navy, completion of the Panama Canal project, and an assertive foreign policy often summarized by his famous advice to "speak softly and carry a big stick."

He also became known as the "trustbuster" for challenging powerful monopolies while promoting vigorous capitalism balanced by public responsibility.

An accomplished intellectual, Roosevelt authored more than 35 books on subjects ranging from history and politics to natural science and military affairs.

His extraordinary curiosity and scholarship distinguished him from many political leaders of his era and helped shape progressive reforms in government, conservation, and economic policy.

Before reaching the White House, Roosevelt assembled one of the most distinguished public careers in American history.

He served in the New York State Assembly, as New York City Police Commissioner, Assistant Secretary of the Navy, Governor of New York, and as vice president before assuming the presidency following the assassination of President William McKinley in 1901.

Even after leaving office, Roosevelt remained politically active. Dissatisfied with his successor, William Howard Taft, he launched the Progressive, or "Bull Moose," Party and ran again for president in 1912, finishing second but losing the election to Woodrow Wilson.

Roosevelt remains one of America's most admired presidents, his likeness immortalized on Mount Rushmore alongside George Washington, Thomas Jefferson, and Abraham Lincoln.

Griffin's latest gift continues a pattern of patriotic philanthropy centered on preserving America's history and civic institutions.

The Citadel founder purchased a rare first printing of the U.S. Constitution for a record $43.2 million in 2021 before later acquiring the only other privately held first printing.

He has loaned both copies for public exhibition and donated $15 million to Philadelphia's National Constitution Center.

Griffin has also helped fund restoration of the Lincoln Memorial, contributed $30 million to the National Medal of Honor Museum Foundation, made record gifts supporting veterans through the Navy SEAL Foundation and the Call of Duty Endowment, and has supported educational and cultural institutions across the country.

"In our nation's 250-year history, few Americans have embodied the spirit of leadership as fully as Theodore Roosevelt," Griffin said in announcing the gift.

"His vision, courage, and commitment to public service left an enduring mark on our nation."

With America's semiquincentennial approaching, Griffin's donation helps ensure that one of the nation's most influential presidents will finally have a presidential library worthy of his extraordinary legacy — built in the very landscape that transformed Theodore Roosevelt from a grieving young rancher into a statesman who reshaped the American presidency.