Heilige Willibrordus
The church of Diessen is named after Saint Willibrord, an English Benedictine monk. Around 712, he donated a number of properties, including properties in Diessen, to the abbey of Echternach. At that time, Willibrord also built a well in the village for baptism. A 16th-century replica can still be seen next to the church, which has undergone several transformations over time. In 1161, the church consisted of a chapel made of wood and straw. In order to manage the properties donated by Willibrord, the abbot of Echternach had appointed a guardian or advocate in various places, who also exercised a form of worldly authority in the area assigned to him. The Benedictines of Echternach were also involved in pastoral care in Diessen.