Complex sentence: He disappointed the German Protestant princes by his refusal to invest Protestant administrators of bishoprics with their imperial fiefs.Yet on a personal basis he granted freedom of worship to the Protestant nobility and worked for reform in the Roman Catholic church, including the right for priests to marry.
Split into simpler sentences: He disappointed the German Protestant princes by his refusal to invest Protestant administrators of bishoprics with their imperial fiefs. On a personal basis, however, he granted freedom of worship to the Protestant nobility and worked for reform in the Roman Catholic church, including the right for priests to marry.