Antiquarian science books
Nicolaus Copernicus' "De revolutionibus orbium coelestium" of 1543 sold for more than US$2 million at auctions . 
<triplet> Nicolaus Copernicus <subj> De revolutionibus orbium coelestium <obj> notable work <triplet> De revolutionibus orbium coelestium <subj> Nicolaus Copernicus <obj> author <subj> 1543 <obj> publication date