Find a history of protestantism in Germany and Switzerland at ://www.isyours.com/e/guide/religion/christianism/protestantism.html/ In this town, they coexisted. The Zurich theologian, Zwingli, shared the same motivations as Martin Luther, says the site.
In investigating old churches, watch in the later ones for the influx of ordinary people, bodies, faces. It looks like the 1400's marked a change: regular folk replacing the saints, that had peopled the churches in the centuries before the 1400's or so. Individual expressions, tastes on clothing, headwear. Hardly inspiring in the sense of recalling to a worshipper the story of the martyrdom or whatever; but far more interesting. This is not just a protestant trend: look at this Catholic church in Sibenik, Croatia, with its human faces circling the exterior, at Sibenik, Cathedral of St. James, Croatia.
First, the German protestant church: It had been a chapel dedicated to Saint Mary from 1518, and was repurposed. See www.igougo.com/journal-j23315-Murten-Medieval_Marvel.html#ReviewID:1182200/
Choir Stalls est. 1494, German Church, Murten, Switzerland
Then see the French Gothic church (Roman Catholic), dating from about 1481. It replaced an earlier St. Catherine's Chapel and has some replacement stained glass windows that are modern and very bright.
French Church, Roman Catholic, modern stained glass, Murten, Switzerland
French Gothic (Catholic) Church, interior, Murten, Switzerland