OderThe Oder (ˈoʊdər , ˈoːdɐ; Czech, Lower Sorbian and Odra; Wódra ˈwʊt.ʀɑ) is a river in Central Europe. It is Poland's second-longest river in total length and third-longest within its borders after the Vistula and Warta. The Oder rises in the Czech Republic and flows through western Poland, later forming of the border between Poland and Germany as part of the Oder–Neisse line. The river ultimately flows into the Szczecin Lagoon north of Szczecin and then into three branches (the Dziwna, Świna and Peene) that empty into the Bay of Pomerania of the Baltic Sea.
GnieznoGniezno (AUDPl-Gniezno.ogg'gńe1zno; Gnesen; Gnesna) is a city in central-western Poland, about east of Poznań. Its population in 2021 was 66,769, making it the sixth-largest city in the Greater Poland Voivodeship. One of the Piast dynasty's chief cities, it was the first historical capital of Poland in the 10th century and early 11th century, and it was mentioned in 10th-century sources, possibly including the Dagome Iudex, as the capital of Piast Poland.
Christianization of PomeraniaMedieval Pomerania was converted from Slavic paganism to Christianity by Otto von Bamberg in 1124 and 1128 (Duchy of Pomerania), and in 1168 by Absalon (Principality of Rügen). Earlier attempts at Christianization, undertaken since the 10th century, failed or were short-lived. The new religion stabilized when the Pomeranian dukes founded several monasteries and called in Christian, primarily German settlers during the Ostsiedlung. The first Pomeranian abbey was founded in 1153 at the site where the first Christian duke of Pomerania, Wartislaw I, was slain by a pagan.
Adalbert of PragueAdalbert of Prague (Sanctus Adalbertus, svatý Vojtěch, svätý Vojtech, święty Wojciech, Szent Adalbert (Béla); 956 - 23 April 997), known in the Czech Republic, Poland and Slovakia by his birth name Vojtěch (Voitecus), was a Czech missionary and Christian saint. He was the Bishop of Prague and a missionary to the Hungarians, Poles, and Prussians, who was martyred in his efforts to convert the Baltic Prussians to Christianity.
KołobrzegKołobrzeg (kɔˈwɔbʐɛk; Kòlbrzég; Kolberg ˈkɔlbɛʁk) is a port city in the West Pomeranian Voivodeship in north-western Poland with about 47,000 inhabitants (). Kołobrzeg is located on the Parsęta River on the south coast of the Baltic Sea (in the middle of the section divided by the Oder and Vistula Rivers). It is the capital of Kołobrzeg County. During the Early Middle Ages, the Pomeranian tribes established a settlement at the site of modern-day Budzistowo. Thietmar of Merseburg first mentioned the site as Salsa Cholbergiensis.
PoznańPoznań (ˈpɔznaɲ) is a city on the River Warta in west-central Poland, within the Greater Poland region. The city is an important cultural and business centre, and one of Poland's most populous regions with many regional customs such as Saint John's Fair (Jarmark Świętojański), traditional Saint Martin's croissants and a local dialect. Among its most important heritage sites are the Renaissance Old Town, Town Hall and Gothic Cathedral. Poznań is the fifth-largest and one of the oldest cities in Poland.
WrocławWrocław (ˈvrɔt͡swaf; Breslau, ˈbʁɛslaʊ; Wrocłow; Brassel; Vratislavia) is a city in southwestern Poland and the largest city in the historical region of Silesia. It lies on the banks of the River Oder in the Silesian Lowlands of Central Europe, roughly from the Sudeten Mountains to the south. , the official population of Wrocław is 673,923 making it the third largest city in Poland. Wrocław is the historical capital of Silesia and Lower Silesia. Today, it is the capital of the Lower Silesian Voivodeship.
