The oldest parts of the Reerslev Church, nave and the chancel, date back to the 12th century and are in the Romanesque style. In the 15th century, a chapel, a vestry and an extension of the nave to the west were added in the late-Gothic style. Cross vaults were also added during this period.
The cross vaults were decorated by the Isefjord school around 1450. After the Reformation, they were covered with limewash for centuries until they were uncovered and partly restored by Jacob Kornerup in 1873. They present pictures of Christ's birth, the Three Kings, children being killed under Herod's orders, the flight to Egypt and the arrival in Jerusalem on Palm Sunday. There are also scenes of the Last Supper, Jesus praying in Gethsemane, Pilot washing his hands, the Crucifixion and the Resurrection.
The church's altar with its panels from 1590 and the pulpit from 1609 are also of interest.
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.