Of the fifteen British routes recorded in the 2nd- or 3rd-century Antonine Itinerary, seven ran to or from Londinium. Most of these have been shown to have been initially constructed near the time of the city's foundation around AD 47. The roads are now known by Welsh or Old English names, as their original Roman names have been entirely lost due to the lack of written and inscribed sources. (It was customary elsewhere to name roads after the emperor during whose principate they were completed, but the number and vicinity of routes completed during the time of Claudius would seem to have made this impractical in Britain's case.)