Pan-Slavism, a movement which crystallized in the mid-19th century, is the political ideology concerned with the advancement of integrity and unity for the Slavic people. Its main impact occurred in the Balkans, where non-Slavic empires had ruled the South Slavs for centuries. These were mainly the Byzantine Empire, Austria-Hungary, the Ottoman Empire, and Venice. Origins Extensive pan-Slavism began much like Pan-Germanism: both these movements flourished from the sense of unity and nationalism experienced within ethnic groups after the French Revolution and the consequent Napoleonic Wars against traditional European monarchies. As in other Romantic nationalist movements, Slavic intellectuals and scholars in the developing fields of history, philology, and folklore actively encouraged Slavs' interest in their shared identity and ancestry. Pan-Slavism co-existed with the Southern Slavic drive towards independence. Commonly used symbols of the Pan-Slavic movement were the Pan-Slavic colours (blue, white and red) and the Pan-Slavic anthem, Hey, Slavs. The first pan-Slavists were the 16th-century Croatian writer Vinko Pribojević, the Dalmatian Aleksandar Komulović (1548–1608), the Croat Bartol Kašić (1575–1650), the Ragusan Ivan Gundulić (1589–1638) and the Croatian Catholic missionary Juraj Križanić ( – 1683). Scholars such as Tomasz Kamusella have attributed early manifestations of Pan-Slavic thought within the Habsburg monarchy to the Slovaks Adam Franz Kollár (1718–1783) and Pavel Jozef Šafárik (1795–1861). The Pan-Slavism movement grew rapidly following the end of the Napoleonic Wars in 1815. In the aftermath of the wars, the leaders of Europe sought to restore the pre-war status quo. At the Congress of Vienna of 1814–1815, Austria's representative, Prince von Metternich, detected a threat to this status quo in the Austrian Empire through nationalists' demands for independence from the empire. While Vienna's subjects included numerous ethnic groups (such as Germans, Italians, Romanians, Hungarians, etc.), the Slav proportion of the population (Poles, Ruthenians, Ukrainians, Czechs, Slovaks, Slovenes, Serbs and Croats) together formed a substantial—if not the largest—ethnic grouping. First Pan-Slav Congress, Prague, 1848 The First Pan-Slav congress was held in Prague, Bohemia, in June 1848, during the revolutionary movement of 1848. The Czechs had refused to send representatives to the Frankfurt Assembly feeling that Slavs had a distinct interest from the Germans. The Austroslav, František Palacký, presided over the event. Most of the delegates were Czech and Slovak. Palacký called for the co-operation of the Habsburgs and had also endorsed the Habsburg monarchy as the political formation most likely to protect the peoples of central Europe. When the