The Grossmünster church is a landmark of Zurich. According to legend, Charlemagne discovered the graves of the city’s patron saints Felix and Regula and had a church built as a monastery on the spot.
In the first half of the 16th century, the Grossmünster church was the starting point of the Swiss-German Reformation led by Huldrych Zwingli and Heinrich Bullinger. The theological college then annexed to the monastery spawned what is now the University of Zürich.
The stained glass windows by Sigmar Polke, the Romanesque crypt, choir windows by Augusto Giacometti, bronze doors by Otto Münch and the cloister Reformation Museum are just some of the highlights see here.
https://www.zuerich.com/en/visit/attractions/grossmuenster-church