London Paddington station, often shortened to simply Paddington, is a central London railway terminus and London Underground station complex in fare zone 1. The site has been the London terminus of the Great Western Railway and its successors since 1838. Much of the mainline station dates from 1854 and was designed by Isambard Kingdom Brunel. The site was first served by Underground trains in 1863, as the original western terminus of the Metropolitan Railway, the world's first underground railway.