Sirk continued his studies for a time at the University of Jena before transferring to Hamburg University, where he switched to philosophy and the history of art. It was here that he attended a lecture on relativity given by Albert Einstein. A major influence in this period was art historian Erwin Panofsky - Sirk was a select member of Panofsky's seminar group for a semester and wrote a large essay for him on the relationship between Medieval German painting, and the mystery plays; in his 1971 interview with Halliday, Sirk declared, "I owe Panofsky a lot." To support himself while studying, Sirk began working as a second-line "dramaturg" at the Deutsches Schauspielhaus in Hamburg. In 1922, substituting for a director who had fallen sick, Sirk directed his first production, the Hermann Bossdorf play "Bahnmeister Tod" ("Stationmaster Death"), which became a surprise success, and from that point Sirk was (in his own words) "lost to the theatre". In addition to the theatre, Sirk worked in many areas of the arts during this formative period - he painted, took a summer job as a set-designer at a Berlin film studio, published his own German translation of Shakespeare's sonnets, translated some of Shakespeare's plays, and published writings of his own.