The understanding of what constitutes space and the spatial underwent a turbulent change towards the end of the 19th century. Non-Euclidean geometry led to the development of new spatial forms in mathematics, and sensory physiologists began to differentiate between various sensory spaces within geometric space.
As a consequence of this, the understanding of long-established philosophical concepts such as “inside” and “outside”, “semblance” and “reality”, or “subjective” and “objective” also began to alter. It was inevitable that these changes, in turn, had some influence on art and the theory of art.
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: Wandelhalle der Gemäldegalerie
