The Grossmünster ("great minster") is a Romanesque-style Protestant church in Zurich, Switzerland. It is one of the four major churches in the city (the others being the Fraumünster, Predigerkirche and St. Peterskirche). Its congregation forms part of the Evangelical Reformed Church of the Canton of Zürich. The core of the present building near the banks of the Limmat River was constructed on the site of a Carolingian church, which was, according to legend, originally commissioned by Charlemagne.