Pomerania-Stolp (German: (Teil-)Herzogtum Pommern-Stolp, Polish: księstwo słupskie, "Duchy of Słupsk") was one of the partitions of the Duchy of Pomerania (German: Herzogtum Pommern). Centered in Słupsk, it was created from another partition of the Duchy of Pomerania, Pomerania-Wolgast, to satisfy Bogislaw V, Duke of Pomerania in 1368, and existed until 1459, when it was inherited by Eric II of Pomerania-Wolgast. In 1474, it was merged to the partition of Bogislaw X, Duke of Pomerania, who four years later became the sole duke of Pomerania.
The Duchy of Pomerania was partitioned several times to satisfy the claims of the male members of the ruling House of Pomerania dynasty. The partitions were named after the ducal residences: Pomerania-Barth, -Demmin, -Rügenwalde, -Stettin, -Stolp, and -Wolgast. None of the partitions had a hereditary character, the members of the House of Pomerania inherited the duchy in common. The duchy thus continued to exist as a whole despite its division.
After the death of Barnim IV of Pomerania-Wolgast in 1366, an armed conflict arose when Barnim's brother Bogislaw V refused to share his power with Barnim's sons, Wartislaw VI and Bogislaw VI, and his other brother, Wartislaw V, who in turn allied with Mecklenburg to enforce their claims. On May 25, 1368, a compromise was negotiated in Anklam, which was made a formal treaty on June 8, 1372 in Stargard, and resulted in a partition of Pomerania-Wolgast.
Bogislaw V received most of the Farther Pomeranian parts. Excepted was the land of Neustettin, which was to be ruled by his brother Wartislaw V, and was integrated into Bogislaw's part-duchy only after his death in 1390. This eastern partition became known as Pomerania-Stolp.
The situation of the descendants of Bogislaw V, who ruled Pomerania-Stolp, differed somewhat from the situation of their western counterparts. The area was more sparsely settled and dominated by powerful noble families, so not much income could be derived by the dukes. On the other hand, the Stolpian branch of the House of Pomerania had relatives among the royal houses of Denmark and Poland. Casimir IV and Elisabeth, the children of Bogislaw V and his first wife Elisabeth, the daughter of Casimir III of Poland, where both raised at the Polish court in Kraków. Elisabeth would become Holy Roman Empress after her marriage with Charles IV, and Casimir was adopted by and designated heir of his grandfather. Yet, his ambitions were thwarted when Ludwig of Hungary overruled the testament of Casimir of Poland in 1370, Casimir of Pomerania-Stolp only for a short time took the land of Dobrin as a fief.
During the Polish–Teutonic wars, the Pomeranian dukes changed sides between Poland and the knights very frequently. Wartislaw VII and Barnim V allied with the Teutonic Order. In 1390 however, after Jogaila (Władysław Jagiełło) had promised to hand part of the heritage of Casimir IV, Wartislaw VII's stepbrother, over to Wartislaw, the latter concluded an alliance with Poland and received the Polish castellany of Naklo (Nakel) and probably some adjacent areas as a fief in return, declaring himself a vassal of Jagiełło III in Pyzdry.
Scholars offer somewhat different interpretations of the treaty of Pyzdry. According to scholars such as Juliusz Bardach, Władysław Czapliński, Fenrych (1961), Marceli Kosman, Tadeusz Ładogórski, Andrzej Nowakowski, Michał Sczaniecki and Kazimierz Ślaski, Wartislaw's oath was for all territory held by him and meant that Pomerania-Stolp itself become a Polish fief. Other descriptions of the treaty included an oath of vassalage of Wartislaw VII to Jagiello without specifying a territory: Gòrski (1947), Labuda (1948),; Mitkowski (1946) and Zientara (1969) wrote the oath was for the territory Waritislaw received as fiefs from Jagiełło (especially Naklo/Nakel); Mielcarz (1976) said the oath was binding only Wartislaw himself, as a person, to Jagiello; and Gumowski (1951) said the document shows Wartislaw giving a general solemn promise of service. Czacharowski (2001) says it was an alliance and refers to Naklo being held as a Polish fief.
With respect to the discourse in Polish historiography, Branig and Buchholz (1997) say that however the treaty is interpreted, it did not have any significance for the future. The vassalage was short-lived; Wartislaw's brothers Barnim V and Bogislaw VIII however took on a friendly attitude towards the Teutonic Order, and Naklo returned to the Polish Crown after Wartislaw's death.
Eric II of Pomerania-Stolp, grand-grandchild of Danish king Valdemar IV in contrast became king of the Kalmar Union in 1397. Eric however failed in his most ambitious plan, to make Bogislaw IX Of Pomerania-Stolp king of both the Kalmar Union and the Polish-Lithuanian Commonwealth. Eric had to leave Denmark in 1449 and ruled Pomerania-Rügenwalde, a small partition of Pomerania-Stolp, until his death in 1459.
Pomerania-Stolp was a crucial point in the knights' land supply route. Bogislaw VIII of Pomerania-Stolp allied with both the Teutonic Knights and Poland, but supported the latter after the war had started in 1409 by blocking his lands for the knights' troops and allowing his nobles to kidnap those who were travelling his lands. For his aid, he was granted the Lauenburg (now Lębork) and Bütow (now Bytów) areas (Lauenburg and Bütow Land) and others, but those were lost in the First Peace of Thorn in 1411.
Eric II of Pomerania-(Wolgast)-Stolp allied with the Polish king Casimir IV in his Thirteen Years' War against the Teutonic Knights. On January 3, 1455, he in turn was granted the Lauenburg and Bütow Land at the Pomerelian frontier. When Lauenburg was retaken by the knights in 1459, the Polish king was upset and ravaged the Stolp area. Eric reconciled with the king on August 21, 1466, and bought the town from the knights on October 11, six days before the Second Peace of Thorn, that was signed by Eric in 1467.
Pomerania-Wolgast was reunited following the death of both Barnim VII and Barnim VIII in 1451. Both dukes died of the Black Death. The same disease caused the death of Joachim of Pomerania-Stettin (also in 1451), Ertmar and Swantibor, children of Wartislaw X, and Otto III of Pomerania-Stettin (all in 1464). Thus, the line of Pomerania-Stettin had died out.
The extinction of the House of Pomerania-Stettin triggered a conflict about inheritance with the Margraviate of Brandenburg. In the Treaty of Soldin of 1466, a compromise was negotiated: Wartislaw X and Eric II, the dukes of Pomerania, took over Pomerania-Stettin as a Brandenburgian fief. This was disputed already during the same year by the emperor, who intervened against the Brandenburgian overlordship of Pomerania. This led to a series of further warfare and truces, that were ended by the Treaty of Prenzlau of 1472, basically confirming the ruling of the Soldin treaty, but settling on a border north of Gartz (Oder) resembling Brandenburg's recent gains. This treaty was accepted by the emperor.
In 1474, Eric II died of the Black Death, and his son Bogislaw X inherited Pomerania-Stolp. Bogislaw's brothers had died the same year. After the death of his uncle Wartislaw X in 1478, he became the first sole ruler in the Duchy of Pomerania since almost 200 years.
Eric II had left Pomerania in tense conflicts with Brandenburg and Mecklenburg. Bogislaw managed to resolve these conflicts by both diplomatic and military means. He married his sister, Sophia, to Magnus II, Duke of Mecklenburg, and his other sister, Magarete, was married to Magnus's brother Balthasar. Bogislaw himself married Magarete, daughter of Brandenburg's Prince-elector Frederick II. Also, in 1478, Bogislaw regained areas lost to Brandenburg by his father, most notably the town of Gartz and other small towns and castles north of the Brandenburgian Uckermark. During the confirmation of the Peace of Prenzlau in 1479, the border was finally settled north of Strasburg and Bogislaw had to take his possessions as a fief from Brandenburg.1368-1373 Bogislaw V
1374-1377 Casimir IV (V)
1377-1395 Wartislaw VII
1395-1402 Bogislaw VIII and Barnim V
1402-1403 Barnim V
1403-1418 Bogislaw VIII
1418-1446 Bogislaw IX
1449-1459 Eric I