 His language was lofty, and followed the model of the ancient classics.Like many of his contemporaries, he liked to apply the fixed formulas of Justinian to the German emperors, probably on the assumption, then widespread, that the Holy Roman Empire was only the continuation of the Roman Empire of the Caesars.His chronicles, written in the form of annals, "Ad librum VII chronici Ottonis Frisingensis episcopi continuatae historiae appendix sive Continuatio Sanblasiana", embrace the period from 1146 to 1209, that is the period from Conrad III to the murder of Philip of Swabia.