The Collegiate Church of St. Stephan, known in German as St. Stephan zu Mainz, is a Gothic hall collegiate church located in the German city of Mainz. It is known for windows created by Marc Chagall.
Wikipedia https://en.wikipedia.org/wiki/St._Stephan,_Mainz
Official Website https://st-stephan-mainz.bistummainz.de/
Address 5 Stefansberg, Mainz 55116, Germany
Coordinates 49°59'44.407" N 8°16'7.944" E