The page linked to by this item records the death of Olav Haraldsson in 1030 at the Battle of Stiklestad. It states only that he was killed by his own people (i.e. the Norwegians) and afterwards canonised. No other details are given
A short article about Olav Haraldsson who was canonised in 1031. He died at the Battle of Stiklestad in 1030, and is credited with bringing Christianity to Norway.
The Culture Centre at Stiklestad was built to mark commemorate the Battle of Stiklestad which is usually taken to mark the coming of Christianity to Norway in 1030.