Nonneseter Abbey is first recorded by name in 1262, but was certainly founded many years earlier, possibly in about 1150. It was dedicated to the
Virgin Mary. The nuns apparently belonged to the
Cistercian Order, although this is not confirmed until as late as 1494. It was a prestigious establishment, and several members of the royal family entered the convent. The nuns elected their Abbess themselves, and the Bishop had no right to interfere except if there was a contested election. Few abbesses are known, but an abbess named Cecilia was elected in 1326. It was evidently one of the biggest convents in Norway; in 1320, the convent had 35 nuns, which was a high number even internationally. It was the richest female convent in Norway, and also richer than many of the male convents: the richest convent in Norway was
Munkeliv Abbey, which had an income of 2500
lauper, with Nonneseter Abbey of Bergen not far behind at 1700 lauper. The Nonneseter was severely devastated by the
Black Death in Norway in 1349. It appears that the Nonneseter Abbey experienced a downturn after the Black death and during the 15th century. Munkeliv Abbey was devastated by fire in 1455, which caused a crisis for that abbey, which was the most important in Norway. On an unknown date, king
Christian I transferred the income, estates and land of Nonneseter to the Munkeliv Abbey to compensate them for the 1455 fire. This was done since the Nonneseter Abbey was almost empty, and the few nuns which remained were moved to an unnamed convent of their order. The buildings were transferred to the
Hospital Brothers of St. Anthony. It is not known when this happened, only that it must have been during the reign of Christian I (1481-1513). Tradition claims that in 1507, the nuns were ejected for immoral and unseemly behaviour. However, since it is known that the field directly outside of the convent was transformed to a shooting field by the Bishop of Bergen in 1497, the nuns must have disappeared between 1481 and 1497. The nunnery underwent
secularisation in 1528, and the premises were converted into a private fortified residence, under the name of Lungegården, by the new proprietor,
Vincens Lunge. A hospital run by the nuns at Nonneseter Abbey was first documented in 1411. It seems probable that this was the forerunner of
St. Jørgen's Hospital (
Sankt Jørgens Hospital) which was later associated with the research and treatment of
leprosy by
Daniel Cornelius Danielssen. ==Site and buildings==