Bengt Birgersson

bishop Benedict, Duke of Finland (1254 - 25 May 1291) was a Swedish prelate and a royal duke.

His father was Birger jarl, the real ruler of Sweden 1250-66 and Benedict was from legitimate marriage. Some sources have caused confusion whether his mother was Ingeborg of Sweden, as it highly likely was, daughter of Eric X of Sweden, mother of Benedict's elder brothers Valdemar and Magnus.

Older but non-contemporaneous Swedish literature has for some reasons made Benedict a son born of Birger's second wife Mechtild of Holstein, dowager Queen of Denmark. However at the time of his birth, Mechtild, widow of Abel of Denmark, yet sojourned evidently in Denmark, and Ingeborg died in 1254.

Youngest son of Birger and youngest brother of king Valdemar I of Sweden and Magnus, Duke of Sweden, later also king, he was put to ecclesiastical career.

Archdeacon of the cathedral of Linköping, he became his brother Magnus' chancellor when Magnus was king.

1284, some time after the death of his next-elder brother Eric of Smalandia, and during the reign of their brother Magnus III, dominus Benedict was created Duke of Finland, the first known holder of that title and appanage.

The title may have been just that of Sweden, the successor office of the position of Riksjarl of Sweden, held previously by Eric of Smalandia, and earlier by Magnus. In this reconstruction, Benedict go appelled as duke of Osterlandia, or Finland, because seemingly much of his fiefs were located in Finland - like his brother Eric's had been in Smalandia.

In 1286 he was elected bishop of Linköping. Linköping's bishop chronicle from 1523 tells of him Scriptores rerum suecicarum medii ævi.

There exists at least two of his last wills, from 1287 and 1289.

He died in plague.