[2] A stone tower was built on the site in the 13th century, probably replacing a previous wooden one, and is probably the "Château Thierry" mentioned in contemporary texts.
[3] The first investigation of the site was by an antiquarian and Jesuit priest, Father Pierre-Joseph Dunod, at the start of the 18th century.
Writing in 1716, Father Dunod speculated that the site was the scene of a decisive battle between Caesar and the Suebi tribe led by Ariovistus.
[4] There were later excavations by the owners of the site, Koeckler and Maupassant, who were found to have planted antiquities that they had purchased elsewhere, the deception being uncovered in 1862 by archaeologist Auguste Quiquerez (1801-1882).
In the 20th century, methodical excavations by Alban Gerster (1898-1986) and in 1984 by a team from the University of Basle, have uncovered a range of finds from Neolithic flint arrow heads to a 10th-century dinarius coin from the reign of Louis IV of France.