Lüne Abbey (German: Kloster Lüne) is an abbey in Lüneburg, in the German state of Lower Saxony, which was originally built for Benedictine nuns and today is home to a chapter of Lutheran conventuals. It is one of several former monasteries administered by the Hanoverian monastic chamber (Klosterkammer Hannover).
Lüne Abbey was founded in 1172 by Hildeswidis von Markboldestorp. In the founding document by Hugo, Bishop of Verden, there is no mention of the observances to be followed, so that it is assumed that it was a chapter of canonesses. Not until 1272 was the nunnery described in a document as an abbey for Benedictine nuns and only from the mid-14th century is a full adoption of Benedictine observances recorded.
The abbey was overseen by an abbess. Its administration and pastoral care was placed in the charge of a provost elected by the nuns. One of these provosts, Henry of Langlingen (aka of Langeln, d. 1381), was elected Prince-Bishop of Verden by the Verden cathedral chapter in 1367. Lüne nunnery belonged to the Bursfelde Congregation.
Following the introduction of the Reformation in the Principality of Lüneburg the first service in the German language was celebrated on 26 April 1528 at the instigation of Duke Ernest the Confessor, despite the opposition of the nuns. In 1529 the provostship's property was placed under ducal administration and a new provost, selected by the local lords, was installed who was to ensure the implementation of Lutheran doctrine.