Complex sentence: The marriage was arranged as part of a series of diplomatic gestures between Cleofa's uncle, Pope Martin V and the Byzantine emperor with the hope that it would facilitate reunification between the Roman Catholic and the Eastern Church.
Split into simpler sentences: The marriage was arranged as part of a series of diplomatic gestures between Cleofa's uncle, Pope Martin V and the Byzantine emperor. It was hoped that it would facilitate reunification between the Roman Catholic and the Eastern Church.