Muri Abbey (German: Kloster Muri) was a Benedictine monastery dedicated to Saint Martin of Tours. It flourished for over eight centuries at Muri, in the Canton of Aargau, near Zürich, Switzerland. While the monastery is currently established as Muri-Gries in South Tyrol , the former abbey is now a museum and heritage site of national significance.

The monastery of Saint Martin of Tours at Muri in the Canton of Aargau, in the Diocese of Basel (but originally in that of Constance), was founded in 1027 by Radbot, Count of Habsburg, one of the progenitors of the House of Habsburg. Rha, a daughter of Frederick, Duke of Lower Lorraine, and Werner, Bishop of Strasburg, each donated a portion of land to a monastery which they established there. A colony of monks was drawn from the nearby Einsiedeln Abbey , under the leadership of Prior Reginbold.