His Denkgebäude, c1984: t.p. (Hans Dieter Schaal) p. 159 (b. 1943; stud. art hist., phil., German lang. & lit., later architecture; artist)

German Wikipedia, March 2, 2017 (Schaal active mainly in fields of exhibition design, stage design, landscape architecture; as stage designer known for collaboration with Ruth Berghaus; first work was 1983, stage set for opera, Die Trojans in Frankfurt; up to 1993 a total of ten opera productions were produced in collaboration with Ruth Berghaus, since then he has worked on many international stages with well-known directors; also designed the rooms of numerous well-known exhibitions, museums and memorials)