Tageno (died 1190) was a Bavarian clergyman and crusader. He was a minor cleric of the cathedral of Passau from at least July 1183. He became dean of the cathedral in 1187 and joined the army of Frederick Barbarossa on the Third Crusade in 1189. He wrote an account in Latin of his experience, known as the Descriptio expeditionis Asiaticae Friderici ("Description of the Asian Expedition of Frederick"), covering the period from 1189 down to 21 June 1190. According to the Historia de expeditione Friderici imperatoris, which plagiarized his Descriptio, Tageno died at Tripoli in the autumn of 1190.