From a Washington Post obit by Joe Holley and Kevin Sullivan headlined “Rosalynn Carter, first lady who championed mental health, dies at 96”:

Rosalynn Carter, a close political and policy adviser to her husband, President Jimmy Carter, who created the modern Office of the First Lady and advocated for better treatment of the mentally ill during her years in the White House and for four decades afterward, died at her home in Plains, Ga.

The Carter Center in Atlanta announced her death on Sunday.