The Treaty of Landin was signed in Landin

Mark Landin

Mark Landin is a municipality in the Uckermark district, in Brandenburg, Germany....

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 in 1250 between Barnim I of Pomerania-Stettin

Barnim I, Duke of Pomerania

Barnim I the Good from the Griffin dynasty was a Duke of Pomerania from 1220 until his death.-Life:...

, the Ascanian margraves Johann I and Otto III of Brandenburg

Margraviate of Brandenburg

The Margraviate of Brandenburg was a major principality of the Holy Roman Empire from 1157 to 1806. Also known as the March of Brandenburg , it played a pivotal role in the history of Germany and Central Europe....

. Barnim I was accepted as co-ruler of Wartislaw III of Pomerania-Demmin

Wartislaw III, Duke of Pomerania

Wartislaw III was a Griffin duke of Pomerania-Demmin. Son of Casimir II of Pomerania-Demmin and Ingardis of Denmark, he was married to a Sophia of an unknown house. As he did not have any children, Pomerania-Demmin ceased to exist with his death.Ingardis ruled Pomerania-Demmin in place of young...

 by the Margraviate of Brandenburg

Margraviate of Brandenburg

The Margraviate of Brandenburg was a major principality of the Holy Roman Empire from 1157 to 1806. Also known as the March of Brandenburg , it played a pivotal role in the history of Germany and Central Europe....

, thereby hindering Brandenburg's succession in Pomerania-Demmin as was ruled out in the 1236 Treaty of Kremmen

Treaty of Kremmen

The Treaty of Kremmen was signed in Kremmen, Germany, on June 20, 1236. Wartislaw III of Pomerania-Demmin had to recognize the Margraviate of Brandenburg's overlordship over the remainder of his duchy, and ceded the terrae Stargard, Wustrow and Beseritz to Brandenburg.-References:...

. Instead of the margraves, Barnim I integrated what was left of Pomerania-Demmin after the territorial losses of 1236 into his Stettin-based duchy. The terra Wolgast

Wolgast

Wolgast is a town in the district of Vorpommern-Greifswald, in Mecklenburg-Vorpommern, Germany. It is situated on the bank of the river Peenestrom, vis-a-vis the island of Usedom that can be accessed by road and railway via a bascule bridge...

 within the Duchy of Pomerania

Duchy of Pomerania

The Duchy of Pomerania was a duchy in Pomerania on the southern coast of the Baltic Sea, ruled by dukes of the House of Pomerania ....

, which was to be inherited by the margraves, was exchanged for Pomeranian-held northern parts of the Uckermark

Uckermark

Uckermark is a Kreis in the northeastern part of Brandenburg, Germany. Neighboring districts are Barnim and Oberhavel, the districts Mecklenburgische Seenplatte and Vorpommern-Greifswald in Mecklenburg-Vorpommern, and to the east Poland . It is the largest district of Germany areawise...

. Barnim also accepted to be a Brandenburgian vassal

Vassal

A vassal or feudatory is a person who has entered into a mutual obligation to a lord or monarch in the context of the feudal system in medieval Europe. The obligations often included military support and mutual protection, in exchange for certain privileges, usually including the grant of land held...

.