St. Martin is the name of a Catholic parish and church in Idstein, Rheingau-Taunus-Kreis, Germany. The official name of the church is . The name of the parish became St. Martin Idsteiner Land on 1 January 2017, when it was merged with five other parishes. The parish is part of the Diocese of Limburg. St. Martin is the patron saint of Idstein, to whom a Gothic church was dedicated in 1330. The present building, designed by architect Johannes Krahn, was consecrated in 1965. It replaced a church built in 1888 in Gothic Revival style and dedicated to Mary Magdalene. The earlier church was too small for the congregation growing after World War II. After restoration in 2003, a new organ was installed in 2006. Church music in services and concerts, performed by several groups including a children's choir and ensembles playing historic instruments, have received attention in the Rhein-Main Region. The parish is in long-term ecumenical contact with the main Protestant church of the town, the , which includes two regular ecumenical services and concerts performed by joint groups of both churches. History of the parish St. Martin The beginning of Christianity in Idstein is not documented. When the Idstein Castle was first mentioned in 1102, the area belonged to the Diocese of Trier. Idstein possibly had a church in Romanesque style, which was replaced in 1330 by a Gothic church dedicated to St. Martin, the patron saint of Idstein. It was the church of a founded in 1333 for six canons, and became the Protestant church with the Reformation, named in 1917. During the Reformation, Idstein became Lutheran beginning in 1540 under . The last Catholic canon left the town in 1553, which then had no Catholic congregation until the beginning of the 19th century. In 1806, Frederick Augustus, Duke of Nassau allowed the practice of the Catholic cult again. Thirteen families were permitted to use the chapel of the Schloss. The dukedom became part of the Kingdom of Prussia in 1866. In 1884, the minister Wilhelm Schilo began the building of a church for a growing congregation, collecting money all over Germany. The architect Aloys Vogt, from the local (School for building trades), designed a hall church with two aisles in Gothic Revival style, built from 1887 to 1888. The building, seating 135 people, was dedicated to Mary Magdalene () by Bishop on 8 October 1888. The Catholic