Complex sentence: After the intercession of the Pope Onorio III, the Emperor Frederick II authorized to its inhabitants of coming back from their exile, and the new city was rebuilt three years after its destruction at about one kilometer from the ancient city.
Split into simpler sentences: After the intercession of the Pope Onorio III, Emperor Frederick II authorised the inhabitants to retuen from exile. The new city was rebuilt three years after its destruction, about one kilometre from the ancient city.