Part of the Voortrekker Monument in Gauteng Province, Pretoria, South Africa, showing Voortrekker ox wagons in the wall surrounding the Monument -- in total there are 64 of these wagons, made out of decorative granite. The Monument was built to honour the Voortrekkers (Pioneers) who left the Cape Colony for the Great Trek in their thousands between 1835 and 1854. Construction began in 1937, and the Monument was inaugurated in 1949.