Dr. Hans Posse was a German art historian, museum curator, and, for over three years, from June 1939 until his death, the special representative of Adolf Hitler appointed to expand the collection of paintings and other art objects which Hitler intended for the so-called "Führermuseum" in Linz, Austria. The museum, which was never built, was to be the core of a cultural center which was part of a planned general rebuilding of the city intended to have it surpass Vienna and rival Budapest.

The Führermuseum or Fuhrer-Museum, also referred to as the Linz art gallery, was an unrealized art museum within a cultural complex planned by Adolf Hitler for his hometown, the Austrian city of Linz, near his birthplace of Braunau. Its purpose was to display a selection of the art bought, confiscated or stolen by the Nazis from throughout Europe during World War II. The cultural district was to be part of an overall plan to recreate Linz, turning it into a cultural capital of Nazi Germany and one of the greatest art centers of Europe, overshadowing Vienna, for which Hitler had a personal distaste. He wanted to make the city more beautiful than Budapest, so it would be the most beautiful on the Danube River, as well as an industrial powerhouse and a hub of trade; the museum was planned to be one of the greatest in Europe.