"Rheinfelden is a municipality in the canton of Aargau in Switzerland, seat of the district of Rheinfelden. It is located 15 kilometres east of Basel. The name means the fields of the Rhine, as the town is located on the Hochrhein. It is home to Feldschlösschen, the most popular beer in Switzerland." (Link 2.)
" The church St. Martin is located in the historic center of Rheinfelden.
"An older and smaller preceding church was replaced by one of almost the current size in the late 11th century. This church was mentioned in 1146 by Bernard of Clairvaux. In 1228 the bishop of Basel gave permit to the foundation of a convent of canons that existed until 1870.
"In 1876 Eduard Herzog received his Ordination as the first Christian-Catholic bishop of Switzerland in St. Martin." (Link 1.)
Link 1: http://www.waymarking.com/waymarks/WMENH7_Stadtkirche_St_Martin_Rheinfelden_AG_Switzerland
Link 2: https://en.wikipedia.org/wiki/Rheinfelden