31 May 1891
Voortrekker leader Andries Pretorius after whom Pretoria was named, died in 1853 at his Magaliesburg home. His body was later exhumed and reburied at Heroes' Acre in Pretoria after General P.J. Joubert's requested the burial of famous Afrikaner leaders in the same cemetery.
References

Manfred, N. (1937), The Voortrekkers Of South Africa. From The Earliest Times To The Foundation Of The Republics, (London: Gordon and Gotch) pg 349.|SAHO, 'Andries Wilhelmus Jacobus Pretorius', from South African History Online, [online], Available at www.sahistory.org.za