 Complete the following phrase:  In 1973 he moved to the Staatsoper Dresden. On 21 April 1974, he took part in the world premiere of Rainer Kunads Sabellicus at the Berlin State Opera. In Dresden he also sang the title role in Bartóks Bluebeards Castle and as Moses in Schoenbergs Moses and Aron, directed by Harry Kupfer. He sang leading roles in the world premieres of Udo Zimmermanns Der Schuhu und die fliegende Prinzessin on 30 December 1976 and Kunads Vincent on 22 February 1979 in Dresden. In 1983, he performed the title role in Aribert Reimanns Lear at the Komische Oper Berlin. He moved to the opera house in 1984 together with Kupfer. Haseleu appeared as Holofernes in the world premiere of Judith by Siegfried Matthus on 28 September 1985 at Berlin State Opera. In 1988, he performed as Leporello in Alexander Dargomyzhskys 