The Church of St. Denis in Liège is a former fortified collegiate church, founded by Notker of Liège in 987 and first consecrated on 12 March 990. The tower was added around 1100. The church has since 1936 been registered as a listed building, and is currently listed as 'exceptional heritage' of Wallonia. The collegiate church was suppressed in 1797, but the building was taken into use as a parish church in 1803.
References:The first written record of church in Danmark locality date back to the year 1291. Close to the church are several stones with a Christian text and cross inscribed. The oldest parts of the present red-brick church are from the 1300s. In the late 1400s the church was enlarged to the appearance it has today. The church has been modified both internally and externally several times, among other things after the fires in 1699 and 1889. There are lot of well-preserved mural paintings in the walls.