German broadcaster Deutsche Welle (DW) 2018 documentary (The Germans), featured Frederick I in its 3rd of 6 episodes. Recently, to commemorate the emperor, the Supply Battalion 131 (called "Battalion Barbarossa") of the Kyffhäuser barracks () built a huge ground artwork in Bad Frankenhausen, which uses among other things 300 roles of fabric (each was 100 meters long). The mission is named ("Redbeard"). Ancestry Children Frederick's first marriage, to Adelheid of Vohburg, did not produce any children and was annulled. From his second marriage, to Beatrice of Burgundy, he had the following children: Beatrice (end 1162/early 1163 – at least early 1174/1179). King William II of Sicily first asked for her hand but the marriage negotiations never came through. She married Guillaume (II) count of Chalon in 1173 and was mother to Beatrix, countess of Chalon. Frederick V, Duke of Swabia (Pavia, 16 July 1164 – 28 November 1170). Henry VI, Holy Roman Emperor (Nijmegen, November 1165 – Messina, 28 September 1197). Conrad (Modigliana, February 1167 – Acre, 20 January 1191), later renamed Frederick VI, Duke of Swabia after the death of his older brother. Gisela (October/November 1168 – end 1184). She was betrothed to Richard, Count of Poitou (later King of England) but died before they could be married. Otto I, Count of Burgundy (June/July 1170 – killed, Besançon, 13 January 1200). Conrad II, Duke of Swabia and Rothenburg (February/March 1172 – killed, Durlach, 15 August 1196). Renaud (October/November 1173 – before April 1174/soon after October 1178). William (June/July 1175 – soon after October 1178). Philip (February/March 1177 – killed, Bamberg, 21 June 1208) King of Germany in 1198. Agnes (early 1179 – 8 October 1184). She was betrothed to King Emeric of Hungary but died before they could be married. Possibly Clemence, wife of Sancho VII of Navarre. See also German monarchs family tree Dukes of Swabia family tree Operation Barbarossa, the codename of the German invasion of the Soviet Union in 1941, named after the emperor by Hitler. Notes References Citations Sources Primary sources Otto of Freising and his continuator Rahewin, The deeds of Frederick Barbarossa tr. Charles Christopher Mierow with Richard Emery. New York: Columbia University Press, 1953. Reprinted: Toronto: University of Toronto Press, 1994. Ibn al-Athir Romuald of Salerno. Chronicon in Rerum Italicarum scriptores. Otto of Sankt Blasien The "Bergamo Master". Carmen de gestis Frederici I imperatoris in Lombardia. Chronicon Vincentii Canonici Pragensis in Monumenta historica