into a larger rope, and vice versa). Because of the very great weight of such lengths of natural fibre, other support trestles are also sometimes used to keep the weight off the ground, where the friction might overcome the strength of the equipment. Other lubrication has sometimes been used to assist the process. Very long cables, such as those used for long-distance undersea communications, have more complex structures, but nonetheless start with similar elements. Because the distances involved are far greater, a more continuous flow process replaces the standard ropewalk, shortening the length of the walk as the runner becomes static, and the feed end becomes far more complex as it has to spin in one direction whilst laying the rope in the other. Although further waterproofing and armoured coatings are normal, the core of the rope is similar to the description. Examples Downtown Liverpool's bohemian RopeWalks district takes its name from this practice and consists of the lanes where this work once took place. Cable Street in London started as a straight path along which hemp ropes were twisted into ships' cables (i.e. ropes). The ropewalk at Chatham Dockyard (as part of the Ropery or Ropehouse) is still producing rope commercially and has an internal length of . When it was constructed in 1790, it was the longest brick building in Europe. Before steam power was introduced in 1836, it took over 200 men to form and close a cable laid rope of circumference. The rope walk is used to form and close the rope, these being the final stages in rope making. Before this the raw hemp, manila hemp or sisal has to be hatchelled, spun into yarn, and tarred. In the early 17th century, Peter Appleby constructed a ropewalk (for the dockyard) in the Christianshavn neighbourhood of Copenhagen, Denmark. From the late 17th century, the ropewalk on the Swedish island of Lindholmen was a key component of the Karlskrona naval base producing rope up to 300 metres in length for the cordage of warships. Although production ceased in 1960, the elaborately designed facility is now open to the public with exhibitions and demonstrations of ropemaking. A similarly scaled facility in Rochefort, Charente-Maritime, France, called the Corderie Royale, is also maintained as a museum within the Centre International de la Mer. In the 18th Century, Malta and Port Mahon, on the island of Menorca, both had open-air ropewalks.