The Mariensee convent (Kloster Mariensee) is an Evangelical Lutheran women's convent in Mariensee, a district of Neustadt am Rübenberge northwest of Hanover.

It is one of five Calenberg Convents, which are administered by the Hanover Monastic Chamber.

The Mariensee convent was founded around 1213–14 as a Cistercian women's monastery by Bernard II, Count of Wölpe, [de ][1] and endowed with a vast landownership.

The Judgment Day (Das Jüngste Gericht) tapestry.