Luther, Zwingli, and Calvin preserved infant baptism against the attacks of more radical reformers including Anabaptists, and with it, sponsors at baptism.
Two analogies that he used quite effectively were between baptism and circumcision and between the eucharist and Passover.
It was the location of the Wars of Kappel in 1529 and 1531, during the turmoils that accompanied the Reformation of Huldrych Zwingli.
The church, like many others, resembles the shape of a ship, symbolizing a vessel for God's work, and it is well known for its stained glass windows picturing twelve reformers: Gustavus Adolphus, John Huss, John Wycliffe, Philipp Melanchthon, Martin Luther, Martin Luther King, Jr., Dietrich Bonhoeffer, Harriet Tubman, John Knox, John Calvin, Huldrych Zwingli, and John Wesley.
Manducatio impiorum ("eating by the impious") or manducatio indignorum ("eating by the unworthy") is the view, held by Martin Luther and Philipp Melanchthon, but denied by Huldrych Zwingli and John Calvin, that even unbelievers who eat and drink the Eucharist eat and drink the body and blood of Christ.
The theory comes largely from the work of the early Reformed theologian Huldrych Zwingli.
The Reformed branch of Protestantism in Switzerland was started in Zürich by Huldrych Zwingli and spread within a few years to Basel (Johannes Oecolampadius), Bern (Berchtold Haller and Niklaus Manuel), St. Gall (Joachim Vadian), to cities in southern Germany and via Alsace (Martin Bucer) to France.
In theology he followed Zwingli, and at the sacramentarian conferences of Heidelberg (1560) and Maulbronn (1564) he advocated by voice and pen the Zwinglian doctrine of the Lord's Supper, replying (1565) to the counter arguments of the Lutheran Johann Marbach, of Strasbourg.