All these thoughts were in the minds of Luther and of his fellow theologians, and had their weight with the Elector of Saxony, when their refusal to join rendered the proposed defensive league impossible. No one was more disappointed than the Landgrave of Hesse, the ablest political leader whom the German Reformation produced. He knew more about Zwingli than his fellow princes in North Germany; he had a keen interest in theological questions; he sympathised to some extent with the special opinions of Zwingli; and he had not the dread of democracy which possessed Luther and his Elector. He believed, rightly as events showed, that differences or suspected differences in theology were the strongest causes of separation; he was correct in supposing that the Lutheran divines through ignorance magnified those points of difference; and he hoped that if the Lutherans and the Swiss could be brought together, they would learn to know each other better. So he tried to arrange for a religious conference in his castle at Marburg. He had many a difficulty to overcome so far as the Lutherans were concerned. Neither Luther nor Melanchthon desired to meet Zwingli. Melanchthon thought that if a conference was to be held, it would be much better to meet Oecolampadius and perhaps some learned Romanists. Zwingli, on the other hand, was eager to meet Luther. He responded at once. He came, without waiting for leave to be given by the Zurich Council, across a country full of enemies. The conference met from October 30th to November 5th, 1529. Luther was accompanied by Melanchthon, Justus Jonas, and Cruciger, Frederick Mecum from Gotha, Osiander from Nürnberg, Brenz from Hall, Stephan Agricola from Augsburg, and others. With Zwingli came Oecolampadius, Bucer, and Hedio from Strassburg, Rudolph Collin (who has left the fullest account of the discussion), two councillors from Basel and from Zurich, and Jacob Sturm from Strassburg. After a preliminary conference between Zwingli and Melanchthon on the one hand, and Luther and Oecolampadius on the other, the real discussion took place in the great hall of the Castle. The tourist is still shown the exact spot where the table which separated the disputants was placed. This _Marburg Colloquy_, as the conference was called, had important results for good, although it was unsuccessful in fulfilling the expectations of the Landgrave. It showed a real and substantial harmony between the two sets of theologians on all points save one. Fifteen theological articles (_The Marburg Articles_) stated the chief heads of the Christian faith, and fourteen were signed by Luther and by Zwingli. The one subject on which they could not come to an agreement was the relation of the Body of Christ to the elements Bread and Wine in the Sacrament of the Supper. It was scarcely to be expected that there could be harmony on a doctrinal matter on which there had been such a long and embittered controversy.