Until 1642, Glis belonged to the parish of Naters, but had been relatively independent in religious matters since the 12th-13th Century. The Church of Our Lady on the Glisacker has been a pilgrimage center of the Upper Valais since the 14th Century. Glis was raised to an independent parish in 1642. At that time, the parish included Brig, Brigerbad, Ried-Brig, Termen, Gamsen and Eggerberg. Excavations in and around the church in 1984 discovered an early Christian aisleless church from around 500. The excavations also discovered a baptistery and side rooms and parts of four other churches. The present church, which combines elements of both the Renaissance and the lateGothic period, owes its appearance to Prismell master builders Peter and Christian Bodmer. In the mid-17th Century they completed the plans drawn up in 1519 by Ulrich Ruffiner.