Swidger or Swidgerus is the first historical bishop of Kujawy. He was probably a German from the Norbertine Order.
Jan Długosz in his chronicle ascribes to him the consecration of the Norbertine monastery in Strzelno on March 16, 1133, but there is no consensus on the reliability of this entry. In any case, in the bull of Innocent II from June 4, 1133, is the first reference of the diocese of Kujawy, which allows us to assume that Swidger was actually a bishop of this diocese this year.
The exact date of Swidger's death is unknown. The Bamberg obituary only gives March 10 without an annual date. His successor Warner is certified for the first time on April 4, 1148, in the protection bullave of Eugene III.
- Fr. Dr Jan Fijałek. Establishing the chronology of Włocławek bishops, (Kraków 1894).
- Karol Maleczyński, Bolesław III Krzywousty, (Cracow, 2010).
- Magdalena Biniaś-Szkopek: Bolesław IV Kędzierzawy - prince of Mazovia and princeps, (Poznań 2009).
- Counter-mindedness of Dlugosz's relationship, at least as to the annual date, was offered by Jan Łukowski: Contribution to the explanation of the original history of the Norbertine monastery in Strzelno, Annals of the Society of Friends of Poznań Studies vol.23, 1896, p. 22 and seq. and Maleczyński, pp. 332 and 357.