The name "Müstert" comes from the Latin "monasterium" and indicates that there was probably already an ecclesiastical centre here in the 6th/7th century, which became increasingly important in the first phase of the beginning missionary work and Christianisation of the rural areas and was later responsible for pastoral care in the Piesport - Emmel - Müstert area (not so much a monastery as a clerical community). We know of a similar example for the area to the left of the lower Moselle. There, in the first half of the 7th century, a "monastery" on the Maifeld (Münstermaifeld) is mentioned as the ecclesiastical centre. It can be assumed that the parish of Monasterium - Müstert fell victim to the Norman invasion at the beginning of the year 882 and that its functions were taken over by the local churches in Emmel and Piesport during the period of reconstruction. In the documents handed down to us, Müstert appears as Munster in 1055, Munstre in 1098, Monasterium in 1179 and Münster at the beginning of the 19th century.
From the beginning of the 12th century, the abbey of Mettlach/Saar appears in the sources as the owner of a manor and the right of patronage and tithe with an estate in Piesport. In 1102, the cleric Ernest donated his allod (entire estate) in Münster = Müstert to the abbey. The legal status of this estate has been documented in several records since 1488. During the Napoleonic era, the manor came to an end, as the estate, sometimes also called Marienhof, was auctioned off on 7 June 1805 together with its goods for 2566 thalers.
The present building was erected in 1553 and consecrated in 1680. The interior of the chapel is characterised by two side altars and the wooden high altar.