The Wasserkirche — Water Church — stands just below the Grossmünster on a small platform that was, until the 19th century, an island in the Limmat. Tradition holds it as the place where Zurich's patron saints Felix and Regula were martyred under Roman rule, and the site has been a church for at least a thousand years; the current late-Gothic building dates from 1486.
The interior is sparse and Protestant — a Reformation church, with whitewashed walls and very little ornamentation — but the proportions are elegant and the building hosts regular concerts and chamber music. The crypt below holds the supposed martyr's stone. Outside, the statue of the Reformer Ulrich Zwingli stares stoically across the square towards the Grossmünster. Five minutes to look around; quietly atmospheric.