His work on the Indian art history started with the studies of the Mughal miniature painting.
The title of his thesis was Kostüm und Mode an den indischen Fürstenhöfen in der Grossmoghul-Zeit ("Costume and fashion at the Indian princely courts in the Great Mughal period").
[1] In 1931, when the German Weimar Republic was declining amid the Great Depression, Goetz migrated to the Netherlands.
[1] His superior Jean Philippe Vogel, a reputed Indologist, became his mentor and Goetz started pursuing India-related research.
Despite this, when the World War II broke out, he was interned by the British administration of India because of his German nationality.
During this time, he also established the journal Bulletin of the Baroda State Museum And Picture Gallery in 1942, and remained its editor until 1954.
[1] He help set up a Department of Museology at the Maharaja Sayajirao University of Baroda, and served a professor of art history there.
[3] In Germany, Goetz became a professor of Oriental Art at the Heidelberg University's Südasien-Institut (South Asia Institute).