The Croatians (Slavs), some time in the middle ages started to be part of the Republic's population. There is a theory that the Croatisation of the region started to happen in the 19-century, with the Republic becoming part of the [[Austria|Austro-Hungarian]] Empire (then called the Habsburg Monarchy). The second theory is that it was much earlier. The 1667 Dubrovnik earthquake,<ref>[http://books.google.com/books?id=vwK4jhvjHQkC&pg=PA86&dq=dubrovnik+earthquake+of+1667&client=safari&cd=1#v=onepage&q=dubrovnik%20earthquake%20of%201667&f=false Earthquake Monitoring and Seismic Hazard Mitigation in Balkan Countries] by Eystein Sverre Husebye</ref> which destroyed the greater part of Dubrovnik has been cited as a turning point for the Republic's ethnic population make up. | The Croatians (Slavs), some time in the middle ages started to be part of the Republic's population. There is a theory that the Croatisation of the region started to happen in the 19-century, with the Republic becoming part of the [[Austria|Austro-Hungarian]] Empire (then called the Habsburg Monarchy). The second theory is that it was much earlier. The 1667 Dubrovnik earthquake,<ref>[http://books.google.com/books?id=vwK4jhvjHQkC&pg=PA86&dq=dubrovnik+earthquake+of+1667&client=safari&cd=1#v=onepage&q=dubrovnik%20earthquake%20of%201667&f=false Earthquake Monitoring and Seismic Hazard Mitigation in Balkan Countries] by Eystein Sverre Husebye</ref> which destroyed the greater part of Dubrovnik has been cited as a turning point for the Republic's ethnic population make up. |