Karl Thomas Robert Maria Franziskus Georg Bahnam von Habsburg (born 11 January 1961), also known as Karl of Austria, is an Austrian politician and the current head of the House of Habsburg-Lorraine, which used to rule the lands of the Holy Roman Empire, the Habsburg Monarchy, the Empire of Austria, the Austro-Hungarian Monarchy, and the Kingdom of Hungary as well as the Crown lands of Bohemia and Croatia by hereditary right until the end of World War I.