The geographic remit included areas that are today part of the land of Brandenburg in Germany and the Province of Lubusz in Poland.

[1] Later, the seat moved to Górzyca (German: Göritz), back to Lebus and finally to Fürstenwalde (Polish: Przybór) on the River Spree.

[citation needed] The Diocese of Lubusz was established about 1125 at the behest of Bolesław III Wrymouth, Polish monarch from the Piast dynasty.

The diocese was established to counter attempts at eastward expansion of the Holy Roman Empire by Emperor Henry V and by the Archbishop of Magdeburg.

Polish monarch Henry II the Pious died in 1241 at the Battle of Legnica fighting the Mongol invasion of Poland.

Seven years later in 1248, his son Bolesław II the Horned permanently lost the Lubusz Land to the archbishopric of Magdeburg and the Ascanian margraviate of Brandenburg.

This lordship or bishopric was not a prince-bishopric or state of the Holy Roman Empire since it was in the Polish realm at the time of its creation.

Since the bishops of Lebus generally supported Polish interests, some time after 1276 they moved the seat of the see east of the Oder to Göritz (Górzyca) due to the pressure exerted by Brandenburg.

The margraves of Brandenburg began to annex further Polish territories to the east of the Oder to their newly formed region of Neumark ("New March").

Bishop Stephan II openly supported King Władysław the Elbow-high, who went to the Neumark region with Polish and Lithuanian troops.

In 1325, in retaliation, Margrave Louis the Brandenburger ordered the governor of the Prince-bishopric — Erich von Wulkow — to capture the episcopal possessions and to destroy the cathedral in Göritz.

Polish monarchs still made peaceful attempts to regain the region but in 1424, the diocese became subordinate to the Prince-Archbishopric of Magdeburg.