Nidarholm Abbey

The English monk and chronicler Matthew of Paris was asked in 1248, while on a diplomatic mission to King Haakon IV, to supervise a reform of Nidarholm.

Nidarholm was the last Roman Catholic stronghold in Norway during the Reformation, under Olav Engelbrektsson, Archbishop of Nidaros.

His men were besieged in 1537 in Nidarholm by the fleet of Jens Splid (1510–1550), and were eventually forced to surrender.

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