I te rautau 7, pea i te tau 639, i whakapumautia e Saint Audomar (Saint Omer) te episekopo o "Terwaan" ko "Terenburg", te whare karakia o Thérouanne, i te wa o te Middle Ages i whakahaere i tetahi waahanga nui o te taha maui o te awa o Scheldt. I te rohe he waahanga o te rohe o Artois no te rohe o Flanders. I te tau 1303 i tahuna te taone e nga ope Flemish i te Pakanga Franco-Flemish
He aha?