The mural was inspired by the geometry of an existing subterranean tunnel, linking Johannesburg’s

Park Station with the Post Office in Jeppe Street. The tunnel is no longer in use, and was previously used to transport postal mail from the train station to the post office. The exhibition formed part of an ongoing research project regarding the subterranean architecture of Johannesburg. The notion of the ‘invisible city’ is thus explored, the network of tunnels and mines which contributed to the establishment of Johannesburg as a city. The relationship of the geometry of the artwork, and the geometry of the volume of the gallery was considered, in keeping with the interest in the link between art and architecture.