Prince Otto of Windisch-Graetz
Prince Otto of Windisch-Graetz (born 7 October 1873 in Graz as Otto Weriand Hugo Ernst Prince of Windisch-Graetz, from 1902 Fürst of Windisch-Graetz; died 27 December 1952 in Lugano) was an Austrian nobleman, who became known through his marriage to Archduchess Elisabeth Marie of Austria, the so-called “Red Archduchess”.