Former US president Bill Clinton was set to delieve the keynote address at the grand opening of the Illinois Holocaust Museum and Education Center in a Chicago suburb.
The $45 million facility housing more than 2,000 Holocaust survivor testimonies will open Sunday.
Holocaust survivor and writer Elie Wiesel was also expected to attend.
Museum organizers said the mission of the museum was to help survivors heal, educate people and ensure another Holocaust does not occur again.
The 65,000 square-foot (20,000 meter) museum is considered the largest of its kind in the Midwest. It has numerous artifacts including a Nazi-era rail car, children's clothes and photographs.
The museum also has an exhibit for children and rooms for reflection.