27 December 1794
The Portuguese battleship São José Paquete Africa (also, São José-Paquete de Africa) was grounded in Camps Bay, Cape, with nearly 500 slaves on board. The ship was totally wrecked and about 200 slaves were drowned. Other sources mention that an earlier ship, also called São José, had been wrecked in 1622 along the Cape coast. About 1300 ships have been wrecked on or near the South African coast since the year 1500.
References

Potgieter, D.J. et al. (eds)(1970).Standard Encyclopaedia of Southern Africa, Cape Town: NASOU, v. 9, pp. 617-8.