Jimmy Carter speaking at Civil Rights Summit

Associated Press
FILE - In this June 28, 2013 file photo, former U.S. President Jimmy Carter speaks in Atlanta. Carter will be the keynote speaker Tuesday, April 8, 2014 on the first day of the Civil Rights Summit at the LBJ Presidential Library in Austin, Texas. (AP Photo/Jaime Henry-White, File)

AUSTIN, Texas (AP) — Former President Jimmy Carter will be the keynote speaker on the first day of the Civil Rights Summit at the LBJ Presidential Library in Austin, Texas.

The summit opens Tuesday and marks the 50th anniversary of the Civil Rights Act of 1964, which outlawed discrimination in public places based on race, ethnicity, religion or gender.

LBJ Library director Mark Updegrove will interview Carter after a day of panels on immigration, gay marriage and music as a catalyst for social change.

Other speakers include former Republican Mississippi Gov. Haley Barbour, San Antonio Mayor Julian Castro, rock singer Graham Nash and gospel singer Mavis Staples.

The summit seeks to examine the legacy of the law that former President Lyndon B. Johnson considered one of his biggest achievements.