The parish included not only the present day Muri, but also Aristau, Buttwil and Geltwil. The monastery also encompassed parts of Beinwil and Besenbüren. The provincial government and the right of high justice were held by the counts of Habsburg. A large minority of the population of Muri became Protestants in 1529, but were re-Catholicised after the Second War of Kappel (1531). The monastery became increasingly important after 1701, and was for many years the wealthiest in Switzerland.