Styria (, Slovene and) is a state or Bundesland, located in the southeast of Austria. In area it is the second largest of the nine Austrian federated states, covering 16,401 km². It borders Slovenia as well as the other Austrian states of Upper Austria, Lower Austria, Salzburg, Burgenland, and Carinthia. The population (as of 2011) was 1,210,700. The capital city is Graz (265,000 inhabitants).
During early Roman times, Styria was inhabited by Celtic tribes. After its conquest by the Romans, the eastern part of what is now Styria was part of Pannonia, while the western one was included in Noricum. During the Barbarian invasions, it was conquered or crossed by the Visigoths, the Huns, the Ostrogoths, the Rugii, the Lombards, the Franks and the Avars. In 595 the latter were defeated by the Slavs, who thenceforth ruled it.
In 1180 Styria separated from the Duchy of Carinthia and became a Grand Duchy of its own; in 1192 it became part of Austria. After the hereditary subdivision of the latter, Styria formed the central part of Inner Austria. Styria developed culturally and economically under Archduke John between 1809 and 1859. In 1918, after World War I, it was divided into a northern section (forming what is the current Austrian state), and a southern one, called Lower Styria, inhabited mostly by ethnic Slovenians, and which was annexed to Yugoslavia, and later in Slovenia.