The Voortrekker Monument pays tribute to the Boers, who left the Cape Town colony to escape British rule and disappeared into the northern and eastern areas of the country in search of new territory. Inside, a 92m-long sculpted marble frieze illustrates this long migration, the Great Trek, which lasted from 1835 to 1839. Pictured on it are the 64 chariots encircling and protecting their camp during the battle ofBlood River, an event commemorated every year on 16 December.