Charles I of Austria or
Charles IV of Hungary (Karl Franz Joseph Ludwig Hubert Georg Otto Marie; 17 August 18871 April 1922) was, among other titles, the last ruler of the
Austro-Hungarian Empire. He was the last
Emperor of Austria, the last
King of Hungary, and the last monarch of the
House of Habsburg-Lorraine. He reigned from 1916 until 1919, when he "renounced participation" in state affairs, but did not abdicate. He spent the remaining years of his life attempting to restore the monarchy until his death in 1922. Following his
beatification by the
Catholic Church in 2004, he has become commonly known as
Blessed Charles of Austria.