Here in Atlanta, the Jimmy Carter Presidential Library and Museum has been part of my daily life for years. Parks and trails surrounding the center connect my neighborhood to the Martin Luther King Jr. National Historical Park downtown and everything in between.

At the end of December 2024, thousands of people walked to the library to pay their respects to the former president as he lay in repose. The cold, snow and darkness of the evening were a stark contrast to the warmth of the volunteers who welcomed us in. Our visit spiraled through galleries exhibiting records of Carter’s life, achievements and lifelong work promoting democracy around the world.

U.S. presidents have been building libraries for more than 100 years, starting with Rutherford B. Hayes. But the urge to shape one’s legacy by building a library runs much deeper. As a scholar of libraries in the Greek and Roman world, I was struck by the similarities between presidential and ancient libraries – some of which were explicitly designed to honor deceased sponsors and played a significant role in their cities.

The Ulpian Library, a great library in the center of Rome, was founded by Emperor Trajan, who ruled around the turn of the second century C.E. Referenced often by ancient authors, it could have been the first such memorial library.

Today, someone visiting Rome can visit Trajan’s Column, a roughly 100-foot monument to his military and engineering achievements after conquering Dacia, part of present-day Romania. A frieze spirals from bottom to top of the column, depicting his exploits. The monument now stands on its own. Originally, however, it was nestled in a courtyard between two halls of the Ulpian Library complex.

Most of what scholars know about the library’s architecture comes from remains of the west hall, an elongated room almost 80 feet long, whose walls........

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