It is located in the Hirsau borough of Calw on the northern slopes of the Black Forest mountain range, in the present-day state of Baden-Württemberg.
It was settled by a colony of fifteen monks descending from Fulda Abbey, disciples of Rabanus Maurus and Walafrid Strabo, under an abbot Liudebert or Lutpert.
Count Erlafried endowed the new foundation with extended lands and other gifts, and made a solemn donation of the whole into the hands of Lutpert, on condition that the Rule of Saint Benedict should be observed.
The count became master of the property and the abbey remained empty for over sixty years, during which time the buildings fell into a ruinous state.
[3] He renovated the premises, but so slowly that they were not refurbished until 1065, when the monastery was resettled by a dozen monks from the renowned Einsiedeln Abbey in Swabia, with Abbot Frederick at their head.
Count Adalbert still retained possession of some of the monastic property, together with a certain amount of unhelpful influence over the community, and regular discipline was very much relaxed.
Abbot William's zeal and prudence by degrees remedied this unsatisfactory state of affairs and inaugurated a period of great prosperity, both spiritual and temporal.
During the Investiture Controversy that shook the Holy Roman Empire, he secured the independence of the abbey from the Counts of Calw and placed its finances on a sound footing.
William completed the buildings already begun and from 1082 afterwards greatly added to them, as the needs of the increasing community required, a new monastery complex on a high plateau on the opposite side of the Nagold river.
The convent followed the next year, when it moved into the adjacent new monastic compound designed according to the Plan of Saint Gall, while old St Aurelius was converted into a priory.
A friend and correspondent of Pope Gregory VII and Archbishop Anselm of Canterbury, William took active part in the politico-ecclesiastical controversies of his time.
Wolfram's successor, Bernhard, carried on the work of revival, freed the abbey from its debts, restored the monastic buildings, and also reformed several other monasteries.
In the days of Abbot John III (1514–1556) Hirsau fell on hard times: the Protestant Reformation began to make its influence felt, and after a brief period of struggle, the abbey, through the involvement of Duke Ulrich of Württemberg, passed into Lutheran hands, though still maintaining its monastic character.