Nelson Mandela

Nelson Mandela was a South African politician who fought against apartheid in the 20th century. (PROSE: Secret of the Black Planet) He was imprisoned for 27 years. (PROSE: The Also People)

He was falsely believed to have died in the 1980s, when in reality he was in prison since 1962.

He died in 2013. (PROSE: The Mandela Effect, Or Monsters on the Streets of London)

Legacy
The phenomenon of significant numbers of people misremembering a significant event became known as the Mandela Effect. (PROSE: The Mandela Effect, Or Monsters on the Streets of London)

The Nelson Mandela International Space Station was named after him. (AUDIO: Scavenger)

When the Transvaal failed to be annexed into the British Empire in 1877, the Fifth Doctor wondered how the alteration to history would affect Mandela. (PROSE: White Man's Burden)

There was a Forrester family legend that they were related to Mandela, but this was untrue. (PROSE: Heritage)

By the 28th century, the IT corporation Panafrica had rewritten history to portray Mandela as the founder of apartheid. (PROSE: Secret of the Black Planet)

Bernice Summerfield once had a dream where she was debating whether humans were evil with a Cyberman, a Dalek, a Sontaran, and Kadiatu Lethbridge-Stewart; Grinx the Sontaran brought up Nelson Mandela's imprisonment as an example of humanity's freedom of choice allowing for conflicting moralities. (PROSE: The Also People)

Behind the scenes
Mandela was played by David Harewood in the 2009 BBC telefilm Mrs. Mandela.