Guduscan origin. The meaning of the geographical term "Dalmatia" now shrank to the coastal cities and their immediate hinterland. These cities were the Romance-speaking Dalmatian city-states and remained influential as they were well fortified and maintained their connection with the Byzantine Empire. The original name of the cities was Jadera (Zadar), Spalatum (Split), Crepsa (Cres), Arba (Rab), Tragurium (Trogir), Vecla (Krk), Ragusium (Dubrovnik) and Cattarum (Kotor). The language and the laws were initially Latin, but after a few centuries they developed their own neo-Latin language (the "Dalmatico"), that lasted until the 19th century. The cities were maritime centres with a huge commerce mainly with the Italian peninsula and with the growing Republic of Venice. The two communities were somewhat hostile at first, but as the Croats became Christianized this tension increasingly subsided. A degree of cultural mingling soon took place, in some enclaves stronger, in others weaker, as Slavic influence and culture was more accentuated in Ragusa, Spalatum, and Tragurium. In the first half of the 10th century Croatia was elevated to a kingdom by Duke Tomislav who also extended his influence further southwards to Zachlumia. As an ally of the Byzantine Empire, the King was given the status of Protector of Dalmatia, and became its de facto ruler. In the subsequent period, the rulers of Croatia exerted influence over Dalmatian cities and islands, occasionally taking control such as the conquest of Zadar in the mid-11th century. Chronicler Thomas the Archdeacon relates that Stephen Držislav took the title "King of Dalmatia and Croatia", and that all subsequent rulers styled themselves in such manner. Petar Krešimir IV of Croatia expanded his rule to permanently incorporate Dalmatian cities and islands by 1069. Upon the death of King Demetrius Zvonimir of Croatia by the end of 1080s, the state entered a period of anarchy and would result in Hungarians under Coloman of Hungary taking control over former Dalmatian possessions along with the rest of the state by 1102. In the High Medieval period, the Byzantine Empire was no longer able to maintain its power consistently in Dalmatia, and was finally rendered impotent so far west by the Fourth Crusade in 1204. The Republic of Venice, on the other hand, was in the ascendant, while the Croatia became increasingly influenced by Hungary to the north, being absorbed into it via personal union in 1102. Thus, these two factions became involved in a struggle in