Adolf von Hildebrand (1847–1921) was a German sculptor.  He worked in a Neo-classical tradition and published his artistic theories in his book Das Problem der Form in der Bildenden Kunst (1893) (The Problem of Form in the Visual Arts).  Two of daughters also became artists: one a painter and the other a sculptor.  The title translates as Autumn.

Adolf von Hildebrand – Herbst (1888)