 The work of Theodor Lipps, a Munich-based research psychologist, played an important role in the early development of the concept of "art psychology" in the early decade of the twentieth century.His most important contribution in this respect was his attempt to theorize the question of Einfuehlung or "empathy", a term that was to become a key element in many subsequent theories of "art psychology".One of the earliest to integrate psychology with art history was Heinrich Wölfflin (1864–1945), a Swiss art critic and historian, whose dissertation "Prolegomena zu einer Psychologie der Architektur" (1886) attempted to show that architecture could be understood from a purely psychological (as opposed to a historical-progressivist) point of view.