The East End of London, often referred to within the London area simply as the East End, is the historic core of wider East London, east of the Roman and medieval walls of the City of London and north of the River Thames. It does not have universally accepted boundaries on its northern and eastern sides, though the River Lea is sometimes seen as the easternmost boundary. Parts of it may be regarded as lying within Central London. The term "East of Aldgate Pump" is sometimes used as a synonym for the area.