The church is dedicated to King Olaf II of Norway, patron saint of the Åland Islands and Jomala.

Pope Alexander III confirmed Olaf's local canonization in 1164, making him a universally recognised saint of the Roman Catholic Church.

The coloured wall paintings from the 1280s on the Western gable represent scenes from the parable of the Prodigal Son.

Considerations to expand the church began in the 17th century and a plan from 1809, while under Swedish rule, was not acted on.

In 1968, a new stained-glass window was donated to the church by the American artist Ture Bengtz, whose ancestors were from Jomala.