Union Chain Bridge

The Union Chain bridge spans the River Tweed between Horncliffe, Northumberland, England and Fishwick, Borders, Scotland. It was designed by Captain (later Sir) Samuel Brown RN, who held patents for the design of the chains, although Brown altered the tower and abutments on the suggestion of John Rennie.

When it opened in 1820 it was the longest wrought iron suspension bridge in the world with a span of 137 metres (449 ft), and the first vehicular bridge of its type in the United Kingdom. It cost £7,700 to construct and pre-dates the Clifton Suspension Bridge and the Menai Bridge, which are of similar design.