Cause célèbre

cause celebre

“Cause célèbre”

Origin:
1. A controversy that causes public debate. The town’s polluted drinking water became a national cause célêbre when it was discovered that the local leaders had allowed it to happen.
2. A legal case that is famous or celebrated. The trial became a cause célêbre for those who felt the defendant was victimized by the legal system.
https://en.wikipedia.org/wiki/Cause_c%C3%A9l%C3%A8bre