Obersteiermark
In Slovenian usage, the term Upper Styria ("Zgornja Štajerska") refers to the whole Austrian state of Styria—as opposed to the traditional region called Lower Styria ("Spodnja Štajerska"), Slovenian Styria ("Slovenska Štajerska") or just Styria ("Štajerska"), the southern third of the former Duchy of Styria which after World War I was allotted to the Kingdom of Yugoslavia according to the 1919 Treaty of Saint Germain and is today part of Slovenia.