Opera in 5 acts by Hindemith to his own lib. based on life of 17th‐cent. astronomer Johannes Kepler (author of De harmonia mundi). Comp. 1956–7 (earlier sketches). Prod. Munich 1957. Preceded by orch. sym. in 3 movts. comp. 1951, F.p. Basle 1952, f. Brit. p. Edinburgh 1953 cond. Furtwängler.