In 1138, Premonstratensian canons from Floreffe Abbey founded the monastery at Postel as a dependent priory.It was located at a crossroads where important medieval roads met, on land given to Floreffe by Fastrad of Uitwijk.The second abbey church, dedicated to St. Nicholas, was built in the Rhineland Romanesque style and dates from the end of the 12th century (1190).The church has since been rebuilt several times, as a result of which the building shows some characteristics of Gothic and Baroque styles.The abbey is a venue for "Musica Divina", the Festival of Flanders Mechelen/Kempen's autumn concert series.