Some critics have impugned his legal knowledge, but probably without justice.
In his closing years he had some controversy with John Locke, whom he considered to have impugned the doctrine of the Trinity.
Osiander, maintaining the infusion of Christ's righteousness into the believer, impugned the Lutheran doctrine of imputation; Chemnitz defended it with striking ability.
He subsequently defended a woman of Arretium, whose freedom was impugned on the ground that Sulla had confiscated the territory of that town.
It was well known during the middle ages, and was largely used by William, archbishop of Tyre, for the first six books of his Belli sacri historic. In modern times its historical value has been seriously impugned, but the verdict of the best scholarship seems to be that in general it forms a true record of the events of the first crusade, although containing some legendary matter.