Irena Sendler

Irena Stanisława Sendler (15 February 1910–12 May 2008) was a Polish social worker, nurse, and underground activist who devoted herself during the Second World War to rescuing Jews under Nazi occupation. Working through a network of welfare workers, resistance members, Polish families, and religious institutions, she helped smuggle approximately 2,500 Jewish children out of the Warsaw Ghetto, secure false documents and identities for them, and find places where they could survive. Her story became one of the best-known accounts of Jewish rescue during the Holocaust. Its deeper significance lies in the way she turned compassion into an organized system of aid, documentation, and responsibility.

Early life and social commitment

Sendler was born Irena Stanisława Krzyżanowska into a Catholic family in Otwock, a town near Warsaw with a substantial Jewish community. Her father, Stanisław Krzyżanowski, was a socialist-minded physician who treated poor patients, including Jews. After he died of typhus, the Jewish community offered financial assistance to his widow and daughter. The memory of that cross-community solidarity remained important to Sendler throughout her life.

During the 1920s she studied law and then Polish literature at the University of Warsaw, where she became involved in social and political activism. She opposed the discriminatory “ghetto benches” imposed on Jewish students at Polish universities and faced disciplinary difficulties and obstacles to employment because of her views. At the Free Polish University, she joined a circle of social workers led by Helena Radlińska. Many of the women in this circle would later participate in efforts to rescue Jews.

Before the war, Sendler worked in a legal counseling and social assistance clinic and in a program serving mothers and children. She traveled through Warsaw’s poorest neighborhoods, helping disadvantaged women and children born outside marriage, and published articles about their situation. In 1935 she joined the Social Welfare and Public Health Department of the City of Warsaw. Her experience in the field—identifying vulnerable families, mobilizing resources, and connecting people with institutions—gave her the practical skills that later made clandestine rescue possible.

Building a rescue network in the Warsaw Ghetto

After Germany invaded Poland in 1939, the occupation authorities barred the municipal welfare department from assisting Jewish residents. Sendler and her colleagues continued to help in secret. They prepared false medical documents, obtained illness certificates, and delivered food, medicine, clothing, and money to people who had been stripped of their property and rights. Special permits allowed welfare employees to enter the ghetto for sanitary inspections, ostensibly to monitor typhus—a disease the Germans feared might spread beyond the walls.

In 1942, as deportations and mass murder intensified, Sendler joined Żegota, the Council to Aid Jews established within the Polish underground and linked to the Polish government-in-exile. Known by the underground name Jolanta, she coordinated assistance, recruited helpers, and searched for hiding places for children. She was not acting alone. Dozens of people—including welfare workers, resistance members, families, nuns, and orphanage staff—formed the larger rescue network.

Children were smuggled out in many ways. Some were hidden on trams, some transported in cars, and others moved through private homes, charity institutions, and convents. False documents gave them Christian names and new identities. They were sometimes taught Christian prayers in case they were questioned. Children were placed with Polish families, in orphanages, and in Catholic convents, including institutions run by Franciscan and other religious communities. Every transfer required trust, money, coordination, and a willingness to endanger the rescuers and their families; in occupied Poland, helping Jews could bring the death penalty.

The lists, the identities, and the cost

Sendler understood that rescuing a child did not end when the child left the ghetto. She carefully recorded each child’s Jewish name, new name, and location so that the child could be found after the war and, if possible, reunited with family or the Jewish community. She hid the lists in glass jars buried in the ground. This record-keeping was an act of responsibility toward the children and a way of preserving their identity when the surrounding world was trying to erase it.

On 18 October 1943, the Gestapo arrested Sendler. She was tortured and interrogated but did not reveal the names of the children, their locations, or her colleagues. The lists escaped the search because her friend Janina Grabowska received them during the raid and concealed them. Sendler was sentenced to death, but Żegota activists bribed guards and secured her release while she was being taken to execution. She then lived underground under a false identity.

During the Warsaw Uprising, Sendler worked as a nurse in a field hospital where Jews were hidden among the other patients. She continued helping until German forces withdrew from the city. Her survival did not erase the enormous losses around her: most of the rescued children’s parents were murdered at Treblinka or disappeared. The question of reunion with family and with the Jewish people therefore remained a painful and complex postwar task.

Rebuilding social services after the war

Sendler did not leave social work after the war. She helped reorganize a children’s home in Warsaw and, in December 1945, became head of the city’s Social Welfare Department. She later held positions in government, the Ministries of Education and Health, and the Warsaw municipal council. She chaired commissions dealing with widows, orphans, and public health, and helped manage organizations supporting children and secular schools. She also worked to establish orphanages and care centers for children, families, older people, and women seeking to rebuild their lives after prostitution.

Her postwar work showed that rescue was not only an emergency act. Under the difficult conditions of postwar Poland, she helped build social services and create paths toward independent life. In 1980 she joined the Solidarity movement. She lived in Warsaw until her death on 12 May 2008, aged 98, and was buried in Powązki Cemetery.

Recognition and the transmission of memory

In 1965, Yad Vashem recognized Irena Sendler as a Righteous Among the Nations. In 1983 she attended a ceremony at which a tree was planted in her honor in the Garden of the Righteous. In 1991 she became an honorary citizen of Israel. Her decorations included the Order of the White Eagle, Poland’s highest civilian honor, the Gold Cross of Merit, and awards from the Order of Polonia Restituta. She was also named an honorary citizen of Warsaw and Tarczyn.

Her story reached a broad international audience especially late in her life, after students at a high school in Kansas discovered it in 1999 with the help of their teacher, Norman Conard. Their play, Life in a Jar, was based on their research and was performed more than two hundred times in the United States and abroad. It made Sendler’s life an educational resource, encouraging young people to study the Holocaust, recognize moral responsibility, and act on behalf of others. In 2009 the story became the television film The Courageous Heart of Irena Sendler, with Anna Paquin portraying Sendler. Biographies, children’s books, documentaries, and educational programs have continued to carry her story to new audiences.

Her public commemoration has also expanded. A walkway near the POLIN Museum of the History of Polish Jews in Warsaw was named for her in 2013, the Polish postal service issued a commemorative stamp in 2018, and a street in Ramat Gan was named after her in 2021. These memorials honor not only one woman but also the wider network of rescuers and the children at the center of its work.

Why Irena Sendler’s legacy belongs in Moreshet

Irena Sendler merits a central place in an archive of Jewish and Israeli heritage because she acted to save Jewish children when helping Jews could mean death. She used her professional knowledge as a social worker as an instrument of resistance and rescue. By helping remove approximately 2,500 children from the Warsaw Ghetto, arranging shelter, preserving their names, and recording their identities, she protected not only their lives but also the possibility that they would remember who they were and where they came from.

Moreshet preserves the stories of people whose actions shaped Jewish life, Israeli society, and the wider human world. Sendler’s legacy joins Holocaust memory to civic responsibility, social work, and moral courage. Through Yad Vashem, Israeli recognition, books, films, streets, and educational programs, her story continues to reach new generations. Moreshet.com includes her not simply as a symbol of heroism, but as a person who worked within a real network, saved children, defended their identities, and demonstrated that even in an age of destruction, responsibility and hope could be organized into action.