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Istanbul Fire Brigade, shown here at Philipopel in 1918, being reviewed by Austro-Hungarian Emperor Charles

Charles I of Austria or Charles IV of Hungary (Karl Franz Joseph Ludwig Hubert Georg Otto Marie; 17 August 1887 – 1 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. (wikipedia)