South African anti-apartheid icon Archbishop Desmond Tutu is marking his 90th birthday.

As South Africa’s anti-apartheid icon Archbishop Desmond Tutu turns 90, recent racist graffiti on a portrait of the Nobel winner highlights the continuing relevance of his work for equality.

Meghan Markle and Prince Harry spent some time with a special person on the final day of their royal tour. In Johannesburg, South Africa, on Wednesday, the Duke and Duchess of Sussex met with Graca Machel, the late Nelson Mandela's widow. Harry, who previously visited Graca during a trip in 2015, looked on in delight as his wife and Graca shook hands. Meghan Markle visits The Nelson Mandela Centenary Exhibition in July 2018 Samir Hussein/Samir Hussein/WireImageAlso on Wednesday, the Duke and Duchess visited Tembisa, a Johannesburg township, where they met young entrepreneurs. RELATED CONTENT:Prince Harry and Meghan Markle Suing British Tabloids: 'My Deepest Fear Is History Repeating Itself'Meghan Markle Wears $139 Trench Dress From This Mall StoreMeghan Markle Makes Two Solo Visits (and Outfit Changes) Ahead of Prince Harry Reunion