Matthew Chapel (Matthiaskapelle) is one of the most important chapels in Rhineland-Palatinate. This chapel was built as a reliquary chapel for the safe keeping of Apostle Matthew’s head. Heinrich II of Kobern brought this relic from the Damiette crusade (1217-1221). The head was kept there for 150 years. Between 1362 and 1381, it was at castle Helffenstein. From 1422 till 1927 it was kept in the cathedral treasures of Trier. After that it was given by Nuntius Pacelli, later Pope Pius XII, to the St. Matthew abbey of Trier. The unusual ground-plan of the chapel is hexagonal and refers to oriental influences of the construction. It was built around 1220-1230.
References:The Pilgrimage Church of Wies (Wieskirche) is an oval rococo church, designed in the late 1740s by Dominikus Zimmermann. It is located in the foothills of the Alps in the municipality of Steingaden.
The sanctuary of Wies is a pilgrimage church extraordinarily well-preserved in the beautiful setting of an Alpine valley, and is a perfect masterpiece of Rococo art and creative genius, as well as an exceptional testimony to a civilization that has disappeared.
The hamlet of Wies, in 1738, is said to have been the setting of a miracle in which tears were seen on a simple wooden figure of Christ mounted on a column that was no longer venerated by the Premonstratensian monks of the Abbey. A wooden chapel constructed in the fields housed the miraculous statue for some time. However, pilgrims from Germany, Austria, Bohemia, and even Italy became so numerous that the Abbot of the Premonstratensians of Steingaden decided to construct a splendid sanctuary.