Retired U.S. Rep. Eddie Bernice Johnson has died, her family said Sunday on social media. She was 88.

A towering Dallas political figure — once a nurse, state legislator and congresswoman — Johnson was the dean of the Texas Congressional delegation before retiring from office in 2022. She proved effective at her work due to her long tenure serving in the U.S. House — nearly 30 years at the time of her passing — and a pragmatist streak that made her open to working with Republicans.

“I am heartbroken to share the news that my mother, Eddie Bernice Johnson, has passed away,” Johnson’s son, Kirk Johnson, wrote in a Facebook post on Sunday. “She was a remarkable and loving mother, mother-in-law, grandmother and great grandmother, as well as a trailblazer and public servant. While we mourn the loss of an extraordinary woman, we celebrate her life and legacy.”

Born in Waco on Dec. 3, 1935, Johnson became one of the most powerful Texas Democrats in recent memory to serve on Capitol Hill. She was the lone Texas-based committee chair in either chamber when she became the chairwoman of the House Science, Space and Technology Committee.

She broke many glass ceilings: she was the first Black woman elected to any seat in Dallas, she was the first nurse and Black Dallasite to serve in Congress, and she was only the third Texas woman — behind Lera Thomas and Barbara Jordan, both from Houston — to represent the state in the U.S. House.

Funeral services are pending, the family said.

“I am stunned and saddened to learn of the passing of my dear friend, Congresswoman Eddie Bernice Johnson,” Dallas Mayor Eric Johnson wrote on X Sunday morning. “Congresswoman Johnson was a groundbreaking leader for this country and for our state and city, and there really are no words to express my profound sense of grief and loss at the passing of this legendary American.”

This is a developing story, check back for updates.