John Theodore de, an excellent engraver, was a native of Liege; but he resided chiefly at Frankfort, where he carried on a considerable commerce in prints. It does not appear when he was born, nor to what master he owed his instructions in the art of designing and engraving. He worked almost entirely with the graver, and seldom called in the assistance of the point. He acquired a neat free style of engraving, excellently well adapted to small subjects, in which many figures were to be represented; as funeral parades, processions, and the like, which he executed in a charming manner. He also drew very correctly. His heads in general are spirited and expressive, and the other extremity of his figures well marked. His back-grounds, though frequently very flight, are touched with a masterly hand. He died, as his sons inform us in the third part of Boissard's collection of portraits, on March 27th, 1598; the two first parts of which collection were engraved by himself, assisted by his sons, who afterwards continued it.