Complex sentence: Cattaro was one of the more influential Dalmatian city-states of romanized Illyrians throughout the Middle Ages, and until the 11th century the Dalmatian language was spoken in Cattaro.
Split into simpler sentences: Cattaro was one of the more influential Dalmatian City-states of romanized Illirians throughout the Middle Ages period. Until the 11th century the Dalmatian language was spoken in Cattaro.