The Marburg Colloquy was a meeting which attempted to mediate between the different opinions of the Lutherans and Zwinglians over the Lord's Supper, and issues relating to transubstantiation. It took place between October 1 and October 4, 1529. The leading protestant reformers of the time attended at the behest of Philipp I of Hessen. Philipp's primary motivation for this conference was political; he wished to unite the protestant states in political alliance, and to this end, religious harmony was an important constituent.

After the Reichstag in Speyer had confirmed the edict of Worms, the need was felt to reconcile the diverging views in particular of Martin Luther and Huldrych Zwingli to have a unified protestant theology. Besides these two, the reformers

Although the two charismatic leaders found a consensus on fourteen points, they kept differing on the last one on the Eucharist: Luther maintained that through consubstantiation, the bread and wine in the Lord's Supper and the representation that the flesh and blood of Christ was also present, whereas Zwingli considered bread and wine only symbols. They parted without having reached an agreement.

At the later Diet of Augsburg the Zwinglians and Lutherans again explored the same territory as that covered in the Marburg Colloquy, and presented separate statements which showed the differences in opinion. Marburské náboženské rozhovory Marburger Religionsgespräche Religionssamtalene i Marburg