Kings Langley is a historic town as well as civil parish in Hertfordshire, England, 21 miles (34 km) northwest of central London to the south of the Chiltern Hills and also now part of the London commuter belt. The town is separated between 2 city government areas by the River Gade with the larger western part in the Borough of Dacorum as well as smaller sized component, to the eastern of the river, in Three Rivers District. It was as soon as the place of Kings Langley Palace, a royal palace of the Plantagenet kings of England. The 12th century parish church of All Saints' houses the burial place of Edmund of Langley (1341-- 1402), the first Duke of York. It is 2 miles (3.2 kilometres) south of Hemel Hempstead and also 2 miles (3.2 km) north of Watford. The place-name Langley is first testified right here in a Saxon charter of circa 1050, where it appears as Langalega. It is spelt Langelai in the Domesday Book of 1086, and is recorded as Langel' Regis in 1254. The name indicates 'long timber or cleaning'.