Salamanca was the first commercially successful steam locomotive, built in 1812 by Matthew Murray of Holbeck, for the edge railed Middleton Railway between Middleton and Leeds, England and it predated Stephenson's Rocket by 17 years. It was the first to have two cylinders. It was named after the Duke of Wellington's victory at the battle of Salamanca which was fought that same year. A model of the locomotive, built by Murray in 1811, is part of the collection held at Leeds Industrial Museum. It is the world's oldest model locomotive.