Gniew is a historic town situated on the left bank of the Vistula River, in the Pomeranian Voivodeship, in northern Poland. It has 6,870 inhabitant…Gniew is a historic town situated on the left bank of the Vistula River, in the Pomeranian Voivodeship, in northern Poland. It has 6,870 inhabitants. It is one of the oldest towns in Eastern Pomerania, and is renowned for its medieval Brick Gothic Castle, which has become one of the region's most recognizable monuments. The town also has other medieval Gothic monuments, and in early modern times it was a centre for the wine trade and the seat of local starosts, most notably John III Sobieski, who was elected King of Poland. Gniew is located in the ethnocultural region of Kociewie in the historic region of Pomerania.