Wellingborough is a market town and borough in Northamptonshire, England, situated from the county town of Northampton. The town is situated on the north side of the River Nene, most of the older town is sited on the flanks of the hills above the river's current flood plain. Due to frequent flooding by the River Nene, the town was mostly built above the current level of the flood plain. Originally named "Wendelingburgh", the settlement was established in the  Saxon period and is mentioned in the Domesday Book under the name of "Wendelburie". The town was granted a royal market charter in 1201, by King John of England.