Henry II the Pious was Duke of Silesia and High Duke of Poland as well as Duke of South-Greater Poland from 1238 until his death. Between 1238 and 1239 he also served as regent of Sandomierz and Opole–Racibórz. He was the son of Henry the Bearded and a member of the Silesian Piast dynasty. In October 2015, the Roman Catholic Diocese of Legnica opened up his cause for beatification, obtaining him the title of Servant of God.
The Duchy of Greater Poland was a district principality in Greater Poland that was a fiefdom of the Kingdom of Poland. It was formed in 1138 from the territories of the Kingdom of Poland, following its fragmentation started by the testament of Bolesław III Wrymouth. In 1177, the state broke had separated into the duchies of Poznań, Gniezno and Kalisz, and united again in 1279, lasting in that form until 1320, when it was incorporated back into the Kingdom of Poland. Its capital was Poznań.
Bolesław the Pious was a Duke of Greater Poland during 1239–1247, Duke of Kalisz during 1247–1249, Duke of Gniezno during 1249–1250, Duke of Gniezno-Kalisz during 1253–1257, Duke of the whole of Greater Poland and Poznań during 1257–1273, in 1261 ruler over Ląd, regent of the Duchies of Mazovia, Płock and Czersk during 1262–1264, ruler over Bydgoszcz during 1268–1273, Duke of Inowrocław during 1271–1273, and Duke of Gniezno-Kalisz from 1273 until his death.
Cedynia is a small historic town in Poland, and the administrative seat of Gmina Cedynia in Gryfino County, West Pomeranian Voivodeship. It is situated close to the Oder river and the border with Germany. The town is known for the 972 Battle of Cedynia, the first historically recorded battle of Poland.
Lubusz Land is a historical region and cultural landscape in Poland and Germany on both sides of the Oder river.
The Duchy of Silesia with its capital at Wrocław was a medieval provincial duchy of Poland located in the region of Silesia. Soon after it was formed under the Piast dynasty in 1138, it fragmented into various Silesian duchies. In 1327, the remaining Duchy of Wrocław as well as most other duchies ruled by the Silesian Piasts passed under the suzerainty of the Kingdom of Bohemia as the Duchies of Silesia. The acquisition was completed when King Casimir III the Great of Poland renounced his rights to Silesia in the 1335 Treaty of Trentschin.
Lebus is a historic town in the Märkisch-Oderland District of Brandenburg, Germany. It is the administrative seat of Amt Lebus. The town, located on the west bank of the Oder river at the border with Poland, was the centre of the historical region known as Lubusz Land, which provides the name for the present-day Polish Lubusz Voivodeship.
Anne of Bohemia, a member of the Přemyslid dynasty, was Duchess of Silesia and High Duchess of Poland from 1238 to 1241, by her marriage to the Piast ruler Henry II the Pious. She was celebrated by the community of Franciscan nuns at St Clara of Prague Abbey in Wrocław as their founder and patron.
Henry the Bearded was a Polish duke from the Piast dynasty.
The Diocese of Lebus is a former diocese of the Catholic Church. It was erected in 1125 and suppressed in 1598. The Bishop of Lebus was also, ex officio, the ruler of a lordship that was coextensive with the territory of the diocese. The geographic remit included areas that are today part of the land of Brandenburg in Germany and the Province of Lubusz in Poland. It included areas on both sides of the Oder River around the town of Lebus. The cathedral was built on the castle hill in Lubusz and was dedicated to St Adalbert of Prague. Later, the seat moved to Górzyca, back to Lebus and finally to Fürstenwalde on the River Spree.
Santok is a village in Gorzów County, Lubusz Voivodeship, in western Poland. It is the seat of the gmina called Gmina Santok.
Władysław Odonic, nicknamed Plwacz or the Spitter, was a duke of Kalisz 1207–1217, duke of Poznań 1216–1217, ruler of Ujście in 1223, ruler of Nakło from 1225, and duke of all Greater Poland 1229–1234; from 1234 until his death he was ruler over only the north and east of the Warta river.
Mieszko of Lubusz, a member of the Silesian Piasts, was Duke of Lubusz from 1241 until his death.
John I, Margrave of Brandenburg was from 1220 until his death Margrave of Brandenburg, jointly with his brother Otto III "the Pious".
Otto III, nicknamed the pious was Margrave of Brandenburg jointly with his elder brother John I until John died in 1266. Otto III then ruled alone, until his death, the following year.
Wilbrand von Kevernburg was the Archbishop of Magdeburg between 1235 and 1253.
The Teltow and Magdeburg Wars were fought between 1239 and 1245 over possession of Barnim and Teltow in the present-day federal German state of Brandenburg. They took place in the 13th century during the course of the Eastern German Expansion. The opposing sides during the armed conflict, which took place on two fronts simultaneously, were:
The Battle of Lubusz (1209) was a battle between the Margraviate of Brandenburg and the Polish princes Władysław III Spindleshanks and Henry I the Bearded. The conflict eventually ended with a Polish victory in 1211 after a successful offensive by Duke Henry I the Bearded.
Duchy of Silesia 
Margraviate of Brandenburg 