In the early Middle Ages, several large tidal channels arose from the Veerse Gat (present-day Veerse Meer) right across the then peat bog region of Zeeland. One of these was the Zwake. In 13th and 14th, this became an important shipping link between Middelburg and Antwerp. In the 15th century, silting up occurred and the Westerschelde became more important. In 1445, the first dam was constructed through the Zwake and more followed. The salt marshes and mud flats were diked in and the remaining channel, the Zwaakse Weel, remained as witnesses in the landscape. In some places wide and elsewhere barely wider than a ditch. Now Natuurmonumenten is working hard on nature restoration and redevelopment.