500: Chaos and Fractals – in Dialogue with Science 514: György Ligeti, Continuum for harpsichord (1968) 515: György Ligeti, String Quartet No. 2 (1968) 516: György Ligeti, Clocks and Clouds for 12-part female choir and orchestra (1972–73) 520: György Ligeti, Concerto for Piano and Orchestra (1985–88) 521: Sketch sheet for computer music and piano etudes (after 1984) 522: György Ligeti, Sketchbook No. 1, with various inserts, notes entitled "Questions to Richter, Peitgen, Mandelbrot"