This lock gate is located at Groot-Ammers, a village about three kilometers southwest of Schoonhoven in the municipality of Molenlanden, on the Lek. Groot-Ammers is first mentioned in history in 1042. Liesvelt Castle, built at that time, was one of the largest and strongest castles in the Netherlands. The lock gate was owned by the lords of Liesvelt. The area Groot-Ammers, the Achterland, Graafland, Peulwijk, Ottoland and Peursum was under the influence of these gentlemen. The bosom was excavated between 1300 and 1400. This watercourse flows into the Lek via a lock gate, and (still) plays an important role in controlling the water level in the Alblasserwaard, although the lock has been taken out of use. This artwork comes with an aluminum BARTH 1125 frame (color: silver satin) and is protected with anti-reflective glass.