Unlike many modern day meetings which typically involve businessmen, who did this assembly bring together? Given the previous question, write a context that contains the answer. It can be 1 - 20 sentences. Context:
In October 1529, Philip I, Landgrave of Hesse, convoked an assembly of German and Swiss theologians at the Marburg Colloquy, to establish doctrinal unity in the emerging Protestant states. Agreement was achieved on fourteen points out of fifteen, the exception being the nature of the Eucharist – the sacrament of the Lord's Supper—an issue crucial to Luther.