De revolutionibus orbium coelestium
Compilation of the series began in 1973 to commemorate the 500th anniversary of Copernicus's birth. The first volume is the astronomer's landmark work, "De revolutionibus orbium coelestium" ("On the Revolutions of the Heavenly Spheres"), which expounded Copernicus's heliocentric theory of the universe. The set is published by Akademie Verlag in Berlin, Germany.