In 845 it was known as Concilium, in 1406 as Conchy-les-Waben, and by 1608 as Conchie.
Conchil was listed among the possessions of the abbey ofSaint Riquier in the 9th century. A house known as ’’’Temple-lez-Waben’’’ was a commandery of theTemplars. In 1307, two Templars from there, Raoul Monteswis and Eudes of Écuires, were captured and burnt at the stake at nearbyMontreuil.
A site historically referred to asTemple-lès-Waben was located in the area known asla Commanderie, a hamlet within the modern commune of Conchil-le-Temple. This Templar establishment was strategically positioned between two roads—one leading to Waben and the other to Montreuil.
A charter dated March 1225–1226 records an agreement between the abbot of Saint-Josse-sur-Mer and the Count of Ponthieu, in which the abbot refers to "our mills at Tigny" and notes that the count would provide men from the community of Waben, explicitly excluding those "banished of the Temple". This implies the presence of a Templar community at Waben during that time.
Further documentation names Jean de Juvigny as the last known preceptor of the Templar house. He was interrogated in June 1308 and again in April 1310 in Paris, during the suppression of theKnights Templar. Despite his prolonged captivity, he was identified as wearing the habit of a Templar sergeant brother.[4]
The archaeological site of Conchil-le-Temple was extensively excavated by F. Lemaire in 1995. It was revealed to be a noteworthy example of Roman-era rural architecture constructed from wood and earth. Established shortly after the Roman conquest, the site lacks stone foundations, even though it was occupied through successive phases for nearly eight centuries.
The layout of the site resembles that of a Gallo-Roman villa.[5]