Johannes Oecolampadius was a German reformer and theologian who played a central role in the Reformation in Basel. Born in Weinsberg, he was a skilled humanist who studied Greek and Hebrew, eventually serving as an assistant to Erasmus for his Greek New Testament. After a brief period as a monk, he became a leading figure in the Reformed tradition, serving as the Antistes of the church in Basel. He was a close associate of Huldrych Zwingli and engaged in significant theological debates with contemporaries such as Martin Luther and Martin Bucer.