The sober building illustrates the ideal of poverty in monastic orders. In 1331, Saint William’s became the parish of shipbuilders and fishermen as evidenced by the anchor decorating the spire.
Protestant worship has been celebrated there since 1534. The adjoining monastery is the residential institution of the High school now called Jean Sturm Gymnasium. The musical tradition is very lively.
In 1895, Eugène Munch created a parish choir which contributed to the re-discovery of Johann Sebastian Bach’s music. The musical group accompanied at the organ by Albert Schweitzer was internationally renowned. Every Good Friday the parish features an outstanding Passion of the German master.