Fritzie Fritzshall survived the Holocaust and the horrors of the Nazi concentration camp Auschwitz during World War II. She died last week at age 91.
The Skokie museum, along with Fritzshall's family, held a celebration of life Thursday morning.
Friends also gathered at her funeral Wednesday to remember a leader who stood against prejudice and anti-Semitism.
Many will remember when Fritzshall shared her painful return visit to Auschwitz with her friend Cardinal Blase Cupich two years ago.
WATCH: Holocaust survivor Fritzie Fritzshall returns to Auschwitz with Cardinal Blase Cupich
"I want the world to remember and to know, to never, ever, ever forget the Holocaust," she said on that trip.
Life came to a horrible end for more than 1 million prisoners at Auschwitz, including her grandfather, brothers and her mother.
As mourners gathered in Wilmette, there was gratitude for the woman who was so determined to change the world with her story.
"Her impact is worldwide," said Marcy Larson, with the Illinois Holocaust Museum. "She was so accessible and so warm and so compelling. Everyone felt Fritzie's warmth and pain and passion for making the world a better place."
RELATED: Holocaust Survivor Fritzie Fritzshall: 'I wouldn't be here today' without women who saved her life at Auschwitz
"The message that she conveyed and her legacy will be that of 'love your neighbor as yourself,'" said Ken Cooper, vice president of the Illinois Holocaust Museum.
Her friendship with a Catholic cardinal archbishop spread that message further.
WATCH: Illinois Holocaust Museum official remembers Holocaust survivor Fritzie Fritzshall
"There really are very few differences between Catholics and Jews and Christians and Jews, you know, we all embrace family and education and peace and kindness towards others, and so, it's important that if you think there are walls, they are miniscule walls," said Jeff Pfeffer, a Illinois Holocaust Museum board member.
As a teenager, Fritzshall promised the women who saved her from death at Auschwitz that she would tell their story.