The convent was founded before 1015 as a Benedictine nunnery or possibly as a collegiate church. In 1166, the house was reformed by Archbishop Reinald of Dassel, who ordered the imposition of the Benedictine rule. Reinald's dispositions were confirmed in 1174 by his successor, Phillip of Heinsberg, and again between 1174 and 1177 by the anti-Pope Calixtus III. The convent later became a women's chapter for women of the nobility.
Circa 1313 some of the nuns moved to Cologne and founded S. Agatha (S. Agatha).
Letters from Elisabeth of Schönau: [Letter to the abbess of Dietkirchen, undated (1)]; [Letter to the abbess of Dietkirchen, undated (2)].
The University library in Bonn possesses a manuscript, beginning casus et pensiones camerariae, written in 1393, from the community, #S 1248.
Codex diplomaticus rheno-mosellanus, ed. Wilhelm A. Guenther (Coblenz: B. Heriot, 1822-1826), Vol. 1, 383, no. 181.
NULL Handschriftenerbe des Deutschen Mittelalters, vol. 1, p. 165.
Lacomblet, Theodor J., ed. Archiv fur die Geschichte des Niederrheins, 7 vols. (Dusseldorf, 1831-1869), vol. 2, 303.
Further research necessary