Cornelismünster

Imperial Abbey of Kornelimünster
Reichsabtei Kornelimünster
Imperial Abbey of the Holy Roman Empire
9th century – 1802
Coat of arms
Kornelimünster in 1789
Capital		Kornelimünster Abbey
Government		Elective principality
Historical era		Middle Ages
•	Abbey founded	814
•	Gained Reichsfreiheit	mid-9th century the 9th century
•	Acquired reliquary (head     of Pope Cornelius)	875
•	Joined Lower Rhenish–     Westphalian Circle	1500
•	Secularised by France	1802
•	Awarded to Prussia	June 9, 1815
Preceded by Succeeded by Frankish Empire Roer (department)

Kornelimünster Abbey (German: Benediktinerabtei Kornelimünster), also known as Abbey of the Abbot Saint Benedict of Aniane and Pope Cornelius, is a Benedictine monastery that has been integrated since 1972. The abbey is located in Aachen (in the district of Kornelimünster/Walheim) in North Rhine-Westphalia in Germany.

The monastery was founded in 814 on the river Inde by Benedict of Aniane, an adviser to Emperor Louis the Pious (successor to Charlemagne). The monastery was at first known as the "Monastery of the Redeemer on the Inde".

In the mid-9th century, the monastery became an Imperial abbey ("Reichsunmittelbar") and received large endowments of land, as well as Biblical or 's relics: a loincloth, a sudarium and a shroud.

In 875, half of the shroud was exchanged for a relic of the head of the martyred Pope Cornelius (died in 253), after which the abbey was known as Sancti Cornelii ad Indam, and later as Kornelimünster. (The full official title of the present monastery is the Abbey of the Abbot Saint Benedict of Aniane and Pope Cornelius).

In the 12th century, a Priest of Aachen composed the famous Tafelgüterverzeichnis, a registry of royal estates and what they owed the king's court. It is one of the earliest pieces of evidence for the extent of the German royal fisc.

In 1500, the Imperial abbey (Reichsabtei) of Kornelimünster became part of the Lower Rhenish–Westphalian Circle.