What is a summary of the Marburg Colloquy?

The Marburg Colloquy took place at Marburg Castle in Marburg, Germany from October 1 to October 4, 529. Philip I of Hesse called the gathering together in hopes of uniting the factions of the Protestant Reformation so that the Protestants would have a more unified front against the Catholic Church.
The main participants in the discussions were Martin Luther and Ulrich Zwingli. On Luther's side was Philipp Melanchthon, and Zwingli's main ally was Johannes Oecolampadius.
The participants at the Marburg Colloquy managed to agree on 14 theological points. However, their viewpoints diverged sharply on the last point concerning Christ's presence in the bread and wine of the Eucharist. Luther contended that in reference to the Eucharist, Christ had said, "This is my body," and that this declaration was meant to be taken literally. Zwingli, on the other hand, argued that Christ was present in the Eucharist in a symbolic and not literal sense.
At the end of the Colloquy, Luther, at Philip's request, wrote up the 15 articles of Marburg. There was no contention about the first 14 items, but for the 15th, Luther was only able to write:

Although at this time, we have not reached an agreement as to whether the true body and blood of Christ are bodily present in the bread and wine, nevertheless, each side should show Christian love to the other side insofar as conscience will permit

Luther refused to shake hands with Zwingli when the meeting concluded, and he then publicly proclaimed his dislike of his opponent. For a time he refused to admit that Zwingli and his followers were Christians, although he later modified his stance on this issue.
https://www.academia.edu/344495/The_Marburg_Articles_of_3_October_1529

https://www.britannica.com/event/Colloquy-of-Marburg