Gründerzeit art-historian; Raphael and Michelangelo scholar. Grimm's father was Wilhelm Grimm 1786-1859 and his uncle Jakob Grimm (1785-1863), the philologist compilers of indigenous folk tales ("Brothers Grimm"). His other uncle was the painter engraver Ludwig Emil Grimm (1790-1863). He attended the Gymnasium of Leopold von Ranke. In 1841 he moved to Berlin and the circle of Bettina (1785-1859) and Achim von Arnim (1781-1831) and began publishing drama and novels. He began legal and philological studies at the universities of Berlin and Bonn.

Professor of European art history from the medieval period to the 19th century whose writing placed a greater emphasis on the relationship between place and artistic production. Keller was born in 1903 to Fritz and Magdalene Schellhas (Kellar).

Author of many of the immensely popular Künstler-Monographien series of Velhagen & Klasing publisher. Knackfuß entered the Dusseldorf Academy in 1869 to study (studio) art under E. von Bendemann and E. von Gebhardt. He joined the Hussar regiment for the Franco-Prussian war making drawings of the conflict. He received a travel prize to study in Rome, 1875-1878. Upon his return he married the daughter of the sculptor H. M. Imhof. In 1880 he was called to the Dusseldorf academy to learn art anatomy. He travelled to Greece, Egypt and Asia Minor to sharpen his skills as a history painter.

Medievalist art historian, proponent of the "generational" idea of art. Pinder initially studied in Göttingen to become a lawyer before switching to archaeology. He attended courses at both the universities of Berlin and Munich. In 1896 he moved to Leipzig to study under August Schmarsow, under whom he wrote a dissertation in art history in 1903. Between 1905 and 1911 he was a lecturer in Würzburg.

Specialist in ancient Greek art.