Paddington, also known as London Paddington, is a central London railway terminus and London Underground station complex, located on Praed Street in the Paddington area. The site has been the London terminus of the Great Western Railway and its successors since 1838. Much of the main-line station dates from 1854 and was designed by Isambard Kingdom Brunel. It was first served by London Underground trains in 1863, as the original western terminus of the Metropolitan Railway, the world's first underground railway. Today, Paddington tube station is served by the Bakerloo, Circle, District, and Hammersmith & City lines.