ook at the map showing the Austria-Hungarian Empire in about 1900. Map of ethnic groups in Austria-Hungary in 1867. Prussia, the Russian Empire, Kingdom of Italy, Serbia and Romania are shown along with these ethnic groups: Germans, Poles, Slovenes, Hungarians, Romanians, Italians, Czechs and Slovaks, Croats and Serbs. What information does the map provide about the Austria-Hungarian Empire? The empire was made up mainly of Austrians and Hungarians. Austria-Hungary was the strongest of the European empires at this time. Austria-Hungary was home to many different ethnic groups. Italians were the largest ethnic group in the Austria-Hungarian Empire.