Frederick I (Kijerumani: [Friedrich] Error: {{Lang}}: text has italic markup (help); 1122 – 10 Juni 1190), maarufu kama Frederick Barbarossa kutokana na ndevu zake nyekundu, alikuwa Kaizari ya Dola Takatifu la Kiroma kuanzia 1155 hadi kifo chake wakati wa vita vya msalaba. Kabla ya hapo alikuwa mfalme wa Ujerumani kuanzia 1152 na mfalme wa Italia mwaka 1155. Halafu alitiwa pia taji la mfalme wa Burgundy, huko Arles tarehe 30 Juni 1178. Canduci, pg. 263 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 Boemiae by Fr. Gelasius Dobner (1764)[1] Archived 13 Agosti 2014 at the Wayback Machine. [2] Haverkamp, Alfred. Friedrich Barbarossa, 1992 Novobatzky, Peter and Ammon Shea.