The massive Wicker Arches were built in the late 1840s in order to carry the Manchester Sheffield and Lincolnshire Railway over the River Don. They were built by John Fowler who later was joint engineer on the construction of the Forth Rail bridge. The arches of the viaduct as they cross the Wicker are one of the most iconic monuments of the City of Sheffield, providing a 'gateway' to the city centre from the Lower Don Valley. Invisible legibility of earlier landscape.