Original sentence: The marriage was to stay without children, and thus heirs, and, although the union was arranged for political reasons, Charles Emmanuel and his wife became devoted to each other, united in their piety and strong belief in the Roman Catholic faith
Edited sentence: Although the union was arranged for political reasons, Clotilde and Charles Emmanuel became devoted to each other, united in their piety and a strong belief in the Roman Catholic faith.The marriage, however, was to stay without children