Mammen is a village in Viborg Municipality, Denmark 7 km north of Bjerringbro.The Mammen area was the finding site of the famous and rich Mammen chamber tomb; a Viking Age chamber tomb, complete with the remains and offerings of a wealthy magnate burial in the winter of 970-71 AD. The tomb was opened in 1868, when a farmer began digging away at the mound of Bjerringhøj. At about the same time, a hoard was unearthed close by in a gravel quarry.