Today the church tower is preserved. The church was probably built in the first half of the twelfth century, reflecting new techniques brought by Cistercian monks from France in 1143. The surviving tower was probably added around 1220. Both structures are thought to have been projects of Ingrid Ylva, mother of Birger Jarl.
^Johansson, Ulf; Neppenström, Mona; Sandell, Kaj (2014) . "Eastern Götaland". DK Eyewitness Travel Guide: Sweden. Kate Lambert & Stuard Tudball, English translation. DK Publishing. p. 149. Retrieved 2014-02-11. "Bjälbo is said to be the birthplace of the founder of Stockholm, Birger Jarl."