The title "Emperor of Austria" was established in 1804 when Francis II declared himself emperor, following the dissolution of the Holy Roman Empire. This title represented the ruler of the Austrian Empire, which included various territories in Central and Eastern Europe. The emperor held significant political power and was a key figure in European affairs during the 19th century. The position of Emperor of Austria lasted until the end of World War I in 1918, when Charles I was the last to hold the title. Following the war, the empire was dissolved, leading to the establishment of several independent nations in the region.