In the United Kingdom, barrows of a wide range of types were in widespread use for burying the dead from the late Neolithic until the end of the Bronze Age, 2900–800 BC. Square barrows were occasionally used in the Iron Age (800 BC-43 AD) in the east of England. The traditional round barrow experienced a brief resurgence following the Anglo-Saxon conquests, with the introduction of northern Germanic burial practices from continental Europe. These later barrows were often built near older Bronze Age barrows. They included a few instances of ship burial. Barrow burial fell out of use during the 7th century as a result of the spread of Christianity.