Langendorf Castle was first mentioned in 1240. The oldest part of the main building dates back to the 15th century and was expanded around 1498 to include the courtrooms. The castle has been in family ownership since 1880 and was passed on to the then-20-year-old heir Manfred Vetter in 1957 - with the aim of restoring and revitalizing the heavily damaged castle. “Concert in the Barn” - from 1994 to 2010, more than 120 concerts featuring young musicians took place in the barn of the castle. The international historical fire helmet collection with approximately 300 helmets was incorporated into the foundation in 2010. The open-air stage, used only ten times, was donated to the Euskirchen district at the end of 2010 for events by schools, clubs, and others. The castle (cellar ground floor and outside) is available for group tours by arrangement.
Visit the Salvatorian Monestry Steinfeld with three characteristic towers.The monastery together with its Basilica belongs to the most important medieval monuments in the Rhineland. Its beginnings go back to the time of Henry I (919 - 936). The basilica attached to the monastery was built between 1142 and 1150 as one of the earliest German vaulted churches by Premonstratensians.
The Ten Stargazes are places where you can observe the impressive night sky. They are easy to reach and perfectly equipped for an astronomical voyage of discovery on your own. Exciting information and suitable installations help to deepen the fascination of stargazing. Each Stargaze has been given its own theme. There, a variety of aspects of astronomy and nocturnal nature as well as local peculiarities are shown.