Johannes Oecolampadius, , or
Oekolampad (1482 – 24 November 1531) was a German theologian religious
reformer from the
Electorate of the Palatinate. He worked with
Erasmus and
Zwingli, and also influenced a later generation of Protestants, including Heinrich Bullinger and John Calvin. Theologically he was considered to be close to Zwingli, with whom he shared a friendly attitude towards
Mary and
Marian veneration.