The monastery was founded in 814 by Benedict of Aniane, adviser to Emperor Louis the Pious, successor to Charlemagne, on the little river Inde. 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 not only great endowments of land but also the so-called biblical or Saviour's relics: the loincloth, the sudarium and the shroud. In 1500, the princely imperial abbey (Reichsfürstabtei) of Kornelimünster became part of the Lower Rhenish-Westphalian Circle.