Three menhirs of Oppagne Excavations in 1906 (Picture Bulletin des Musées royaux d'Art et d'Histoire, 2nd series, 1st year, no. 6, June 1908). Luma Ed., Aywaille - Coll. Pera In 1948 the central menhir was lying (Ed. Jos. Renard, Oppagne - Coll. Pera)
