Ribemont-sur-Ancre2023-02-14T15:51:09ZJ. Kunowtag:atlantides.org,2009:pleiades/133ba9e64245ee2e06c0b08b5450ca77Ribemont-sur-Ancretag:atlantides.org,2009:pleiades/133ba9e64245ee2e06c0b08b5450ca772023-02-14T15:51:09ZRibemont-sur-Ancre is the site of a Celtic and Gallo-Roman sanctuary located on the right bank of the Ancre river, a tributary of the Somme. Roger Agache discovered the site in 1962. The site is vast in its area, covering some 80 ha.49.963464 2.552572 49.965648 2.552572 49.965648 2.555380 49.963464 2.555380 49.963464 2.552572