The history of the abbey in the Middle Ages is principally marked by the efforts of the religious community to maintain a life true to the Rule of Saint Benedict amidst the various pressures caused by external social developments.
The energy of the Counter-Reformation found lasting expression in the construction of an enormous Baroque abbey complex between 1696 and 1726, commissioned by Abbot Gerhard Oberleitner (1696-1714), which still today, along with the High Castle (Hohe Schloss), characterises the town of Füssen.
The architect Johann Jakob Herkomer (1652-1717) succeeded in turning the irregular medieval abbey premises into a symmetrically organised complex of buildings.
The transformation of the medieval basilica into a Baroque church based on Venetian models was intended to be an architectural symbol of the veneration of Saint Magnus.
Among the artists who contributed various forms of decoration for the building were Anton Sturm, Franz Georg Hermann,[2] Jakob Hiebeler and Paul Zeiller, whose only extant oil paintings are in the Chapter Hall.
On 15 January 1803 Princess Wilhelmine ordered Abbot Aemilian Hafner to dissolve the abbey and vacate the premises by 1 March of that year.