Pretoria - President Jacob Zuma has extended his condolences to the family of Ilse Naude after she died from a heart attack in Cape Town last Thursday.
Naude was the wife of the late Dr Beyers Naude.
In a statement, the Presidency said it had learnt with sadness of the sudden passing of the Afrikaner theologian and staunch anti-apartheid activist.
At the time of her death, Naude was 98. Her husband died at the age of 89 in 2004.
"We will always remember Tannie Ilse as the pillar beside her late husband, Dr Naude, a pioneer of non-racialism and one of the stalwarts of our struggle for liberation both here and abroad, they both loved and were loved by our people, black and white," said President Jacob Zuma.
Naude leaves behind four children, four grandchildren and three great-grandchildren.