The islet, separated by a narrow sea passage, provided them with greater security and enabled easier defense. In the seventh century, fleeing from the Slavs and Avars, the settlement was expanded by refugees from the town of Epidaurum, which was located in the area of today’s Cavtat. Even today, the remains of Epidaurus can be seen under the sea. Later, opposite Laus, a settlement was formed on the coast, in the oak grove (forest, mostly of oak, small oak), so it was given the Slavic name Dubrovnik, which prevailed over the Roman name Ragusa. Today’s Stradun, the main street, is a former sea passage between the island and the mainland! Dubrovnik developed into a rich republic. It is often said that the Republic of Dubrovnik was one of the most advanced small maritime republics of all time.