Prince Philip of Hesse arranged this colloquy with a view toward allying evangelical territories against the threat of Roman Catholic invasion. The Lutherans insisted that such an alliance would require theological concord. Lutheran and Zwinglian theologians thus met at Marburg in 1529. Martin Luther and Philip Melanchthon represented the Lutherans, while Huldrych Zwingli, Johannes Oecolampadius and Martin Bucer spoke for the Zwinglians. The Lutheran and Zwinglian theologians agreed with relative ease on fourteen of fifteen articles drawn up by Luther. Zwingli declined to assent to the fifteenth article on the presence of Christ in the Holy Communion. The Lutherans insisted on a statement confessing Christ's real presence in the bread and wine. Zwingli, on the other hand, maintained the view that Christ was symbolically present in the Supper. The two parties failed to reach an agreement on this point. This portended the confessional division of the Lutherans and the Zwinglians at the Diet of Augsburg in the following year.