9th–12th centuries

The abbey was dedicated in 832 and was elevated to the status of a Reichsabtei ("Imperial abbey") under Emperor Louis the Pious (d. 840). In ecclesiastical matters it was answerable directly to the Pope and was endowed with a third of the estates originally intended for Corvey Abbey.

In 860, at the instigation of the abbess Haduwy (Hedwig), the bones of Saint Pusinna, later the patron saint of Herford, were brought from her hermitage at Binson ("vicus bausionensis" near Châlons-en-Champagne, Corbie). The presence of these relics in the abbey increased its importance and its dedication was changed in due course to Saints Mary and Pusinna.

In the time of the abbess Matilda I her granddaughter Matilda, later Saint Matilda, was brought up here. In 909, through the negotiations of her grandmother, she was married to Henry, Duke of Saxony and later King Henry I of Germany.^[1]

Between 919 and 924 Herford was destroyed by Hungarians but was rebuilt by 927.

Reichsunmittelbarkeit

In 1147 the abbey, which by this time had almost 850 estates and farms, was granted Imperial immediacy (German: Reichsunmittelbarkeit). This made it an independent territory within the Holy Roman Empire (although admittedly a very small one, comprising part of the area of the present city of Herford) which lasted until 1803. The abbesses became Imperial princesses (German: Reichsfürstinnen) and sat in the Reichstag in the College of Prelates of the Rhine. The territory belonged to the Lower Rhenish-Westphalian Circle.

Territory of Herford Abbey (circled in purple) on a late 18th century map

The first Vögte seem to have been the Billunger, and after they died out, Henry the Lion, who appointed the Counts of Schwalenberg as under-Vögte. From 1180, after the fall of Henry the Lion, they exercised the same function for the Archbishopric of Cologne and the Duchy of Westphalia. By 1261 the office seems to have passed to the Counts of Sternberg and in 1382 to the Counts of Jülich-Berg.

In the vicinity of the abbey there grew up the town of Herford, which had acquired municipal rights by 1170/1180 and later, as the Reichsstadt Herford, acquired Reichsunmittelbarkeit in its own right.

By the end of the 15th century, "Sancta Herfordia" ("Holy Herford"), as it became known, had some 37 churches, chapels, monasteries and other religious houses, and hospitals. Its spiritual life was thus comparable to that of a great centre such as Cologne.

Reformation

In 1533, during the Reformation, Herford Abbey became Lutheran, under the Electors of Brandenburg. From 1649 for over a century the abbesses were all Calvinist but that did not alter the Lutheran character of the principality.

Dissolution

In 1802 the abbey was dissolved in the course of secularisation under the terms of the Reichsdeputationshauptschluss and on 25 February 1803 was annexed to the County of Ravensberg, which belonged to the Kingdom of Prussia. In 1804 it was turned into a collegiate foundation for men, and in 1810 finally suppressed.

The former abbey church remains in use as Herford Minster (Herforder Münster).