Former first lady Barbara Bush died Tuesday night at her home in Houston, Texas. She was 92.

“A former first lady of the United States of America and relentless proponent of family literacy, Barbara Pierce Bush passed away Tuesday, April 17, 2018, at the age of 92,” a statement from the office of former President George H.W. Bush read after the news broke.

The 33rd first lady of the United States met her husband, George H.W. Bush, at a Christmas dance at the Round Hill Country Club in Greenwich, Connecticut, in 1941.

They ended up marrying four years later on Jan. 6, 1945. The couple went on to be married for 73 years—the longest marriage of any president in U.S. history.

Bush was one of only two women ever to be the wife and mother of presidents.

The two had six children: Dorothy Bush, Marvin Bush, Neil Bush, former Florida Gov. Jeb Bush, Pauline (Robin) Bush and former President George W. Bush. Their first daughter, Pauline, who was born in December 1949, died of leukemia at age 3.

After leaving the White House in 1993, Bush dedicated her life to the cause of literacy, raising more than $1 billion for charity with her husband. Bush wrote a children’s book, “C. Fred’s Story,” in 1984 and donated all proceeds to literacy charities.

Early Life

Bush was born June 8, 1925, in Manhattan, N.Y., to Pauline (Robinson) Pierce and Marvin Pierce. She grew up with two older siblings, Martha and James, and younger brother Scott.

At a young age, Bush attended Rye’s Milton Public School and Rye Country Day School in New York before enrolling in Ashley Hall, a boarding school in Charleston, S.C., in 1940.

When Bush was 16, she met 17-year-old George H.W. Bush at a school dance. They were engaged at First Presbyterian Church in Rye, N.Y., a year and a half later.

First Lady

Bush focused on literacy issues as first lady after the election of her husband, the incumbent vice president, to the presidency in 1988. She created the Barbara Bush Foundation for Family Literacy, which donated over $40 million as of 2014 to create or expand more than 1,500 literacy programs nationwide, according to CBS News.

“The American Dream is about equal opportunity for everyone who works hard. If we don’t give everyone the ability to simply read and write, then we aren’t giving everyone an equal chance to succeed,” Bush said in a statement.

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“Focusing on the family is the best place to start to make this country more literate, and I still feel that being more literate will help us solve so many of the other problems facing our society,” she wrote in her memoir released in 1994.

One of the Bushes also wrote another children’s book, “Millie’s Book: As Dictated to Barbara Bush,” which raised nearly $1 million for literacy programs.

‘A Rock’

Bush had been battling problems with her health for several years and was hospitalized multiple times throughout the past decade for a variety of issues. On April 15, a spokesman for the Bush family announced she would not seek additional medical care, after a series of recent hospitalizations.

“The American Dream is about equal opportunity for everyone who works hard.”—Barbara Bush

“It will not surprise those who know her that Barbara Bush has been a rock in the face of her failing health, worrying not for herself—thanks to her abiding faith—but for others,” a statement from the office of George H.W. Bush said. “She is surrounded by a family she adores, and appreciates the many kind messages and especially the prayers she is receiving.”

In 2017, the two were unable to attend President Donald Trump’s inauguration because they were both hospitalized for their individual ailments.

“Barbara and I are so sorry we can’t be there for your inauguration on January 20th. My doctor says if I sit outside in January, it likely will put me six feet under. Same for Barbara. So I guess we’re stuck in Texas,” the former president wrote in a letter to Trump at the time. “But we will be with you and the country in spirit.”

Jenna Bush Hager highlighted her grandparents’ relationship in an interview with NBC’s “Today,” saying she was surrounded by family and her husband of 73 years.

“She’s with my grandpa, the man she’s loved for over 73 years,” she said. “They are surrounded by family, but I think the fact that they’re together and that he still says, ‘I love you, Barbie’ every night is pretty remarkable.”