Christian humanist and Roman Catholic priest who, breaking with his Roman faith, became a primary Reformer at Strasbourg.

Educated at the German universities of Ingolstadt and Freiburg, Capito became a diocesan preacher (1512) in Bruchsal, where he met the future Reformers John Oecolampadius (Oecolampadius, Johann) and Conrad Pellican. Appointed cathedral preacher at Basel, Switzerland, in 1515, he lectured at the university and met the celebrated humanist Desiderius Erasmus (Erasmus, Desiderius) and the subsequent leader of the Swiss Reformation, Huldrych Zwingli (Zwingli, Huldrych).

To Capito's dismay, Archbishop Albrecht of Mainz summoned him in 1519 to Mainz as cathedral preacher and later as chancellor. Badly torn in conscience, he twice visited Martin Luther (Luther, Martin) at Wittenberg. By 1523 he fully believed in the cause of the Reformation; he resigned his post at Mainz and went to Strasbourg, where he joined forces with Martin Bucer (Bucer, Martin) in reforming Strasbourg and southern Germany and in consolidating the leading German, French, and Swiss Evangelical ministers. In 1530 he and Bucer drafted the Confessio Tetrapolitana, the confession of faith submitted by five southern German cities to the emperor at the Diet of Augsburg.

Unlike Bucer, Capito remained friendly to the Anabaptists (Anabaptist), the fringe wing of the Reformation, and other dissenters complicating the Strasbourg Reformation—until 1534, when he clearly repudiated them. His most important work is considered to be Berner Synodus (after the synod held at Bern, Switzerland, in 1532), which deals essentially with church discipline and pastoral instruction. An active participant in several important church synods, he died of plague while returning from the colloquy of Regensburg.