Complex sentence: Assisi Cathedral (or "Cattedrale di San Rufino di Assisi"), dedicated to San Rufino (Rufinus of Assisi) is a major church in Assisi, Italy, that has been important in the history of the Franciscan order.
Split into simpler sentences: Assisi Cathedral (or "Cattedrale di San Rufino di Assisi"), dedicated to San Rufino (Rufinus of Assisi) is a major church in Assisi, Italy. The cathedral has been important in the history of the Franciscan order.