Complex sentence: About 836, Abbot Marquard founded a new monastery, Münstereifel; in 1017 Abbot Urald founded at Prüm a collegiate foundation for twelve priests; in 1190 Abbot Gerhard founded a house for ladies of noble birth at Niederprüm.
Split into simpler sentences: About 836, Abbot Marquard founded a new monastery, Münstereifel; in 1017, Abbot Urald founded at Prüm a collegiate foundation for twelve priests. In 1190, Abbot Gerhard founded a house for ladies of noble birth at Niederprüm.