Norrköping [ˈnɔrːˈɕøːpɪŋ] is a city in the province of Östergötland in eastern Sweden and the seat of Norrköping Municipality, Östergötland County. The city has a population of 87,247 inhabitants in 2010, out of a municipal total of 130,050, making it Sweden's tenth largest city and eighth largest municipality.
The city is situated by the mouth of the river Motala ström, at Bråviken, an inlet of the Baltic Sea. Water power from the Motala ström and the good harbour were factors that facilitated the rapid growth of this once industrial city, known for its textile industry. It has several nicknames such as: "Sweden's Manchester", "Peking" and "Surbullestan" (Surbulle [sour bun] was a local nickname for the textile workers, and stan is short for Staden, which means The City or The Town in Swedish)
The city has medieval foundations by settlers around the Norrköping twin city with Linköping Motala stream estuary, who used the falls and rapids to power their mills. The stream was also full of fish such as salmon. Exact dates are uncertain, but there are mentions of a church in the 12th century. It was dedicated to Saint Olaf, Norway's patron.
Birger Jarl (help·info) (c. 1200 – 21 October 1266), or Birger Magnusson, was a Swedish statesman, Jarl of Sweden and a member of the House of Bjelbo, who played a pivotal role in the consolidation of Sweden. Birger also led the Second Swedish Crusade, which established Swedish rule in Finland. Additionally, he is traditionally attributed to have founded the Swedish capital, Stockholm around 1250. Birger used the Latin title of Dux Sweorum which in English equals Duke of Sweden, and the design of his coronet combined those used by continental European and English dukes.
It is known that Birger grew up and spent his adolescence in Bjälbo, Östergötland but the exact date of his birth remains uncertain and available historical sources are contradictory. Examinations of his mortal remains indicate that he was probably about 50 upon his death in 1266 which would indicate a birth around 1216. However, his father Magnus Minnesköld is assumed to have died no later than 1210, which would lead to an assumed birth a few years earlier. Under any circumstance, he was the son of Ingrid Ylva, who according to Olaus Petri was a daughter of Sune Sik and granddaughter to Sverker the Elder, which would make Birger a matrilineal member of the House of Sverker. His brothers or half-brothers — Eskil, Karl, and Bengt — were all born long before 1200, and it can therefore be assumed that they had another mother. He was also a nephew of the jarl Birger Brosa from the House of Bjelbo. The combination of this background proved to be of vital importance.