Complex sentence: It became the capital of Giustizierato (province) of Capitanata, under whose jurisdiction also included Molise, the city was the seat of provincial officials and the court of the Royal Audience.
Split into simpler sentences: It became the capital of Giustizierato, (province) of Capitanata, under whose jurisdiction also included Molise. The city was the seat of provincial officials and the court of the Royal Audience.