In addition, the buildings suffered great damage in 1393 when the abbey was attacked by pirates known as the Victual Brothers (vitaliebrødrene).
Both Olav Nilsson and Leif Thor Olafsson, Bishop of Bergen, died during the attack.
The monks' herb garden near Puddefjord was later cultivated by the Bergen pharmacist, Løveapoteket, for medicinal plants, until the surrounding areas were built up in the 19th century.
These include the well-known marble head of King Eystein I discovered by Nicolay Nicolaysen, supposedly the oldest-known portrait of a Norwegian.
At that time there were still remains of walls above ground up to a height of roughly 2.4 metres, but these were demolished after the excavations.