Harvard University has "shamelessly" turned a profit from photos of two 19th-century slaves while ignoring requests to turn the photos over to the slaves' descendants, according to a lawsuit filed Wednesday.

Tamara Lanier, of Norwich, Connecticut, is suing the Ivy League school for "wrongful seizure, possession and expropriation" of images she says depict two of her ancestors. Her suit, filed in Massachusetts state court, demands that Harvard immediately turn over the photos, acknowledge her ancestry and pay an unspecified sum in damages.

Harvard spokesman Jonathan Swain said the university "has not yet been served, and with that is in no position to comment on this complaint."

At the center of the case is a series of 1850 daguerreotypes, an early type of photo, taken of two South Carolina slaves identified as Renty and his daughter, Delia. Both were posed shirtless and photographed from several angles. The images are believed to be the earliest known photos of American slaves.

They were commissioned by Harvard biologist Louis Agassiz, whose theories on racial difference were used to support slavery in the U.S. The lawsuit says Agassiz came across Renty and Delia while touring plantations in search of racially "pure" slaves born in Africa.

"To Agassiz, Renty and Delia were nothing more than research specimens," the suit says. "The violence of compelling them to participate in a degrading exercise designed to prove their own subhuman status would not have occurred to him, let alone mattered."

The suit attacks Harvard for its "exploitation" of Renty's image at a 2017 conference and in other uses. It says Harvard has capitalized on the photos by demanding a "hefty" licensing fee to reproduce the images. It also draws attention to a book Harvard sells for $40 with Renty's portrait on the cover. The book, called "From Site to Sight: Anthropology, Photography, and the Power of Imagery," explores the use of photography in anthropology.

Among other demands, the suit asks Harvard to acknowledge that it bears responsibility for the humiliation of Renty and Delia and that Harvard "was complicit in perpetuating and justifying the institution of slavery."

A researcher at a Harvard museum rediscovered the photos in storage in 1976. But Lanier's case argues Agassiz never legally owned the photos because he didn't have his subjects' consent and that he didn't have the right to pass them to Harvard. Instead, the suit says, Lanier is the rightful owner as Renty's next of kin.

The suit also argues that Harvard's continued possession of the images violates the 13th Amendment, which abolished slavery.

"Renty is 169 years a slave by our calculation," civil rights attorney Benjamin Crump, one of Lanier's lawyers, said in an interview. "How long will it be before Harvard finally frees Renty?"

Lanier says she grew up hearing stories about Renty passed down from her mother. While enslaved in Columbia, South Carolina, Renty taught himself to read and later held secret Bible readings on the plantation, the suit says. He is described as "small in stature but towering in the minds of those who knew him."

The suit says Lanier has verified her genealogical ties to Renty, whom she calls "Papa Renty." She says he is her great-great-great-grandfather.

If given the photos, Lanier said she would tell "the true story of who Renty was." But she also hopes her case will spark a national discussion over race and history.

"This case is important because it will test the moral climate of this country, and force this country to reckon with its long history of racism," Lanier said at a news conference outside the Harvard Club of New York City.

Crump, her attorney, added that the case could allow Harvard to "remove the stain from its legacy" and show it has the courage "to finally atone for slavery."

Lanier alleges that she wrote to Harvard in 2011 detailing her ties to Renty. In a letter to Drew Faust, then Harvard's president, Lanier said she wanted to learn more about the images and how they would be used. She was more explicit in 2017, demanding that Harvard relinquish the photos. In both cases, she said, Harvard responded but evaded her requests.

The school has used the photos as part of its own effort to confront its historical ties to slavery. At the 2017 conference called "Universities and Slavery: Bound by History," referenced in the lawsuit, Harvard printed Renty's portrait on the program cover and projected it on a giant screen above the stage.

In the image, Renty stares hauntingly into the camera, his hair graying and his gaunt frame exposed.

Lanier, who was in the audience at the event, said she was stunned by a passage in the program that described the origins of the photo but seemed to dismiss her genealogical findings. It said that the photo was taken for Agassiz's research and that "while Agassiz earned acclaim, Renty returned to invisibility."

The suit alleges that "by contesting Ms. Lanier's claim of lineage, Harvard is shamelessly capitalizing on the intentional damage done to black Americans' genealogy by a century's worth of policies that forcibly separated families, erased slaves' family names, withheld birth and death records, and criminalized literacy."

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