Complex sentence: From a long established family of Lothringen, who had to take refuge from the forces of France, he however managed in 1675 to become the titular Duke of Lorraine at a time when Lorraine was occupied by France.
Split into simpler sentences: From a long established family of Lothringen, who had to take refuge from the forces of France. However, he managed in 1675 to become the titular Duke of Lorraine at a time when Lorraine was occupied by France.