Duchy of Świecie

Duchy of Świecie Księstwo świeckie (Polish)
1248/1264–1270
Capital	Raciąż (before 1264) Świecie
Official languages	Polish, Latin
Religion	Roman Catholic
Government	Duchy
Duke
• 1248/1264–1270	Mestwin II
Historical era	High Middle Ages
• Partition from the Duchy of Gdańsk	1248/1264
• Conquest of the Duchy of Lubiszewo	1269
• Conquest of the Duchy of Gdańsk and re-establishment as the Duchy of Pomerelia	1270
Preceded by Succeeded by Duchy of Gdańsk Duchy of Kuyavia Duchy of Lubiszewo Duchy of Eastern Pomerania
Today part of	Poland

Duchy of Świecie (Polish: księstwo świeckie) was a duchy in Pomerelia centred around Świecie. Its only ruler was duke Mestwin II of the Samboride dynasty.

History

The state was established between 1248 and 1264, with duke Mestwin II being given the lands by his father, Swietopelk II, from the Duchy of Gdańsk. He was originally given the lands around Raciąż and Szczytno, and around 1264, he incorporated into his territories Świecie, conquered from the Duchy of Kuyavia, which become the capital of the state. In 1269, it incorporated the Duchy of Lubiszewo, and the year later, in 1270, it conquered the Duchy of Gdańsk, uniting its lands into the Duchy of Pomerelia.