(JTA) — Bernice Tannenbaum, who served as National President of Hadassah, the Women’s Zionist Organization of America from 1976 to 1980, has died.

Tannenbaum, who was a former JTA vice president and national secretary, died on April 6 at the age of 101.

Tannenbaum initiated the practice of Hadassah periodically holding its annual convention in Israel, convening the first such Jerusalem gathering in 1978. She also launched Hadassah’s first strategic planning initiative, resulting in key structural changes.

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She served as chair of the Hadassah Medical Organization from 1980 to 1984. In 1983, she founded Hadassah-International, which currently is represented in 21 countries. She served as international coordinator of Hadassah International for 10 years.

Tannenbaum spearheaded the U.S. campaign for repudiation of United Nations General Assembly Resolution 3379, equating Zionism with racism, which came to a successful conclusion in 1991 when the U.N. repealed the resolution. In 2000, she played a central role as spokesperson for Hadassah’s successful campaign to achieve NGO consultative status in the United Nations Economic and Social Council.

She was co-president of the World Confederation of United Zionists for 15 years, after which she became honorary president. She served as vice president and national secretary of the Jewish Telegraphic Agency, vice president of the United Israel Appeal and National Vice President of the American Israel Public Affairs Committee.

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In 2003, Mrs. Tannenbaum received Hadassah’s highest honor, the Henrietta Szold Award for Distinguished Humanitarian Service, and in 2009 the Hadassah Foundation established the Bernice S. Tannenbaum Prize, which recognizes innovative contributions to advance the lives of women and girls in Israel and the United States.

She studied at Brooklyn College, earning a bachelor’s degree in English literature and art. She joined Hadassah in 1944.

“We mourn the loss of a great leader not only of Hadassah but of the Jewish people,” said Marcie Natan, Hadassah’s current national president. “Bernice was one of the most beloved and productive Hadassah figures of the past half century. She was a tower of strength and a fount of wisdom. The legacy of accomplishment and inspiration that she leaves is immeasurable.”