In the previous the wealth of Dubrovnik has ever been predicated on marine commerce. Republic of Dubrovnik at the middle Ages has become the just city-state on the eastern Adriatic coast. In those times Dubrovnik has collaborated with the Venetian Republic. Besides its abundance and diplomacy, the town has attained huge growth, particularly during the 15th and 16th centuries. The town has been one of the main centers for growth of Croatian literature and language. The town was also a birth location of many significant Croatian poets, dramatists, painters, mathematicians, physicists and others.